{"title":"Tillotson Kart Carburetors \u0026 Rebuild Kits","description":"\u003cp\u003eTillotson HL-series kart carburetors and rebuild parts, including complete rebuild kits, OEM double-stack diaphragm and gasket kits, and filter adapters. Some original HL carb models are no longer available from Tillotson.\u003c\/p\u003e","products":[{"product_id":"tilt-fulcrum-arm-spring-24b-299-tfas","title":"Tillotson 24B-299 High-Pressure Fulcrum Arm Spring - 37 Gram Tension - OEM Carburetor Component","description":"\u003cp\u003ePrecision throttle recovery in high-performance go karts demands a carburetor that snaps back without hesitation, and the Tillotson 24B-299 High-Pressure Fulcrum Arm Spring delivers exactly that. Engineered for maximum durability, this authentic OEM component provides a precise 37-gram tension rating to eliminate sluggish response times during aggressive track sessions. When you are pushing your racing go kart motor to the absolute limit, relying on fatigue-resistant racing parts is the only way to maintain a predictable power band and clean fuel delivery.\u003c\/p\u003e\u003ch2\u003eUncompromising Reliability for Your Racing Go Kart Motor\u003c\/h2\u003e\u003cp\u003eThe heart of your fuel system requires consistent pressure to meter fuel accurately. This 37g fulcrum spring ensures the inlet needle seats perfectly every time, preventing flooding and maintaining optimal pop-off pressure. Whether you are building a custom setup or just searching for the best go karts shop near me to source reliable replacements, integrating authentic Tillotson components guarantees your carburetor withstands the intense vibrations and repeated cycles of competitive racing.\u003c\/p\u003e\u003ch2\u003ePrecision Engineering for Parts Mini and Full-Size Chassis\u003c\/h2\u003e\u003cp\u003eSluggish throttle response costs you tenths of a second out of every corner. By upgrading to the 24B-299 high-pressure spring, drivers experience immediate fulcrum arm return, translating to tighter control during high-speed maneuvers. It is an essential upgrade for maintaining clean, efficient carburetor operation across various engine classes. If you have been browsing go karts for sale near me and want to ensure your new chassis runs flawlessly from day one, starting with a freshly rebuilt carburetor using OEM springs is non-negotiable.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthentic OEM Tillotson Component:\u003c\/strong\u003e Part number 24B-299 ensures exact fitment and flawless integration into your racing carburetor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise 37-Gram Tension:\u003c\/strong\u003e Delivers balanced pressure without over-stressing delicate internal carburetor components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFatigue-Resistant Steel:\u003c\/strong\u003e Withstands thousands of racing cycles without losing its critical spring rate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Throttle Recovery:\u003c\/strong\u003e Snaps the fulcrum arm back instantly to eliminate fuel metering delays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Pop-Off Pressure:\u003c\/strong\u003e Vital for maintaining accurate fuel delivery in high-vibration track environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Carb Compatibility:\u003c\/strong\u003e Fits a wide range of Tillotson carburetors used in competitive karting classes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion-Resistant Finish:\u003c\/strong\u003e Protects against harsh racing fuel additives and extreme track conditions for long-lasting reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the 37-gram tension rating important for my carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The 37g tension is critical for maintaining the correct \"pop-off\" pressure. If the spring tension is too light, the needle may unseat prematurely, causing flooding; if it is too heavy, the engine may starve for fuel at high RPMs. This OEM spring ensures your fuel metering remains consistent with factory specifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if my fulcrum arm spring needs to be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e If you notice sluggish throttle response, inconsistent fuel delivery, or if the engine struggles to maintain a steady power band, the spring may have lost its tension due to fatigue. Replacing it with a fresh 24B-299 spring is a cost-effective way to restore crisp throttle recovery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this spring compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This spring is designed for specific Tillotson models that utilize this tension rating. It is highly recommended to check your carburetor’s service manual or verify the part number against your existing internal components to ensure proper fitment and fuel pressure calibration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to adjust anything else when installing a new fulcrum spring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, whenever you change the fulcrum spring, you should verify the fulcrum arm height. The arm must be set to the manufacturer's recommended height relative to the carburetor body to ensure the inlet needle seats correctly and the pop-off pressure is accurate.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-tfa\"\u003eTillotson HL\/HW Series Captured Fulcrum Arm - 155A-27 OEM Fuel Control Lever - All Classes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-throttle-return-spring-ttrs\"\u003eDurable Tillotson Throttle Return Spring 24B-381\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl\"\u003eTillotson DG-4HL Diaphragm \u0026amp; Gasket Kit - Double Stack Carbs - OEM Spec\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr\"\u003eOEM Tillotson Complete Rebuild Kit for Double Stack Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562561106238,"sku":"TFAS","price":2.88,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tilt-fulcrum-arm-spring-24b-299-tfas.jpg?v=1763111873"},{"product_id":"filter-adapter-for-hl334wxa-ec-306vs-hl334fa","title":"EC Carburetors 306VS Billet Velocity Stack \u0026 Filter Adapter - Tillotson HL-334WX - OHV Clone","description":"\u003cp\u003eWhen you are dialing in your race rig with premium kart parts, the EC Carburetors 306VS Billet Velocity Stack and Filter Adapter is a mandatory upgrade for your Tillotson HL-334WX or HL-334WXA carburetor. Designed specifically for high-RPM clone and OHV engines, this precision-machined adapter does more than just hold a filter—it actively smooths and accelerates incoming airflow to maximize your fuel signal and volumetric efficiency.\u003c\/p\u003e\u003ch2\u003ePrecision Carb Parts for Maximum Velocity\u003c\/h2\u003e\u003cp\u003eUnlike stamped steel alternatives, this CNC-machined 6061-T6 billet aluminum velocity stack is engineered to optimize laminar flow. By reducing turbulence at the carburetor throat, the EC 306VS enhances throttle response, allowing you to hit the powerband faster out of the corners. Whether you are rebuilding your top end, inspecting your engine bearings, or fine-tuning your air\/fuel mixture, integrating high-quality carb parts like this velocity stack ensures your engine breathes without restriction.\u003c\/p\u003e\u003ch2\u003eBulletproof Filtration for Dusty Tracks\u003c\/h2\u003e\u003cp\u003eIn the dirt or on the asphalt, ingestion of debris is the fastest way to ruin a race weekend. This adapter provides a secure, seamless mounting point for your primary air filter and pre-filter. By keeping contaminants out of the venturi, you extend the lifespan of your internal components—from the piston rings down to the crankshaft. While you might be busy checking the parts of a wheel hub assembly or searching for a new go kart frame for sale, don't neglect the intake system that keeps your powerplant alive.\u003c\/p\u003e\u003ch2\u003eKey Features \u0026amp; Technical Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC-Machined Billet Aluminum:\u003c\/strong\u003e Crafted from aerospace-grade 6061-T6 alloy for unmatched durability and precision fitment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Internal Radius:\u003c\/strong\u003e Smooths incoming air to increase velocity and improve the fuel signal at the carburetor throat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact Fitment:\u003c\/strong\u003e Specifically designed for Tillotson HL-334WX and HL-334WXA carburetors used on Clone and OHV engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Filter Mounting:\u003c\/strong\u003e Provides a rigid clamping surface for high-flow air filters, preventing slip-offs during heavy vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware Included:\u003c\/strong\u003e Comes fitted for 8-32 bolts, ensuring a straightforward, track-side installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Throttle Response:\u003c\/strong\u003e Minimizes intake turbulence for quicker revs and more consistent high-RPM performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTrack-Tested Reliability\u003c\/h2\u003e\u003cp\u003ePit organization and quick maintenance are critical when the staging lane calls. The EC-306VS (SKU: HL334FA) allows for rapid filter swaps between heats, keeping your setup clean and your focus on the race strategy. Note: Velocity stacks may not be legal in all restricted racing classes; always verify with your local rulebook before hitting the grid.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this velocity stack compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, this specific adapter (EC-306VS) is precision-engineered exclusively for the Tillotson HL-334WX and HL-334WXA carburetors. Please check your carburetor model number before purchasing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this adapter come with the necessary mounting hardware?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the kit includes the necessary hardware fitted for 8-32 bolts, allowing for a quick and secure installation at the track.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this velocity stack improve my engine's throttle response?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Absolutely. By smoothing the incoming airflow and reducing turbulence at the carburetor throat, this billet adapter helps the engine reach the powerband faster, resulting in snappier throttle response.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this in any racing class?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e While this part is designed for performance, some restricted racing classes have specific rules regarding intake modifications. Always consult your local track or series rulebook to ensure velocity stacks are permitted in your class.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the billet aluminum construction benefit my kart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Unlike stamped steel, the CNC-machined 6061-T6 billet aluminum provides a rigid, durable mounting surface that resists vibration and ensures a perfect seal for your air filter, preventing debris ingestion.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/filter-adapter-for-hl348f-ec-319vs-hl348fa\"\u003eEC Carburetors EC-319VS Billet Velocity Stack - Tillotson HL-304WXA \u0026amp; HL-348 - Open\/Modified Class\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EC Carburetors","offers":[{"title":"Default Title","offer_id":52562569101630,"sku":"HL334FA","price":20.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-filter-adapter-for-hl334wxa-ec-306vs-hl334fa.jpg?v=1763112045"},{"product_id":"tillotson-diaphragm-gasket-kit-iame-spec-orange-dg3-hw","title":"IAME Spec Orange Tillotson Diaphragm and Gasket Kit for Precision Tuning","description":"\u003cstrong\u003eOrange for performance\u003c\/strong\u003e – the IAME spec Tillotson DG3-HW diaphragm and gasket kit brings race-proven materials to your carb rebuild. Tailored for demanding setups, these components feature enhanced durability in the signature orange hue, ensuring they withstand the punishing vibrations of kart racing while maintaining exact tolerances.\u003cp\u003eEver wonder why top teams swear by spec parts? This kit optimizes diaphragm flex for better fuel pulsation, leading to crisper throttle transitions and heightened power output. It's not just a replacement; it's an upgrade that helps fine-tune your engine for specific IAME configurations, potentially unlocking hidden RPMs for that extra burst on straights.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOrange diaphragms for IAME compatibility and visibility\u003c\/li\u003e\n\u003cli\u003ePrecision gaskets to prevent metering inconsistencies\u003c\/li\u003e\n\u003cli\u003eBuilt for high-stress racing environments\u003c\/li\u003e\n\u003cli\u003eFacilitates quick, clean installations\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTrackside organization improves with this kit's focused contents, allowing mechanics to swap parts swiftly without sifting through extras. SKU: DG3-HW. The payoff is evident in smoother idling and reduced hesitation, giving you the confidence to push limits in every session.\u003c\/p\u003e\u003cp\u003eFurther, its spec adherence means seamless integration with IAME-tuned carbs, supporting advanced jetting strategies that adapt to varying track temps. Kart aficionados highlight how it extends service intervals, keeping costs down while performance soars. Embrace this kit to transform your kart from contender to champion.\u003c\/p\u003e\u003cp\u003eIn practice, users report noticeable improvements in mid-range torque, vital for overtakes. Pair it with regular inspections for a holistic approach to engine health that keeps you organized and ahead.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the orange color significant for this diaphragm kit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The signature orange material is specifically engineered for IAME-spec carburetors. It offers superior resistance to the high-frequency vibrations found in racing karts, ensuring the diaphragm maintains its structural integrity and precise fuel pulsation over long race sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my carburetor diaphragms and gaskets?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e For competitive racing, we recommend inspecting your carburetor components before every race weekend. Replacing the diaphragm and gasket kit regularly prevents metering inconsistencies caused by material fatigue, ensuring your engine maintains peak performance and consistent throttle response.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this kit help with my engine's mid-range torque?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. By ensuring the diaphragm flexes correctly, this kit optimizes fuel delivery. Many racers report improved mid-range torque and crisper throttle transitions, which are vital for effective overtakes on the track.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this kit compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This kit is specifically designed for IAME-spec configurations. Please verify your carburetor model against the DG3-HW specification to ensure proper fitment and performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the benefit of using spec-adherent parts for my rebuild?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Using spec-adherent parts ensures that your carburetor functions exactly as intended by the engine manufacturer. This allows for more predictable jetting strategies and helps you avoid the performance drop-off associated with generic, non-spec replacement parts.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-iame-spec-orange-rk6-hw\"\u003eIAME Spec Orange Complete Tillotson Rebuild Kit for Elite Kart Performance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl\"\u003eTillotson DG-4HL Diaphragm \u0026amp; Gasket Kit - Double Stack Carbs - OEM Spec\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-hi-speed-hl348e-43-966-til-43-966\"\u003eTillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-low-speed-hl357a-43-388\"\u003ePrecision Adjustable Low-Speed Needle HL357A for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/brass-screen-tbs\"\u003eHigh-Quality Brass Screen Filter for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562571362622,"sku":"DG3-HW","price":28.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tillotson-diaphragm-gasket-kit-iame-spec-orange-dg3-hw.jpg?v=1763112093"},{"product_id":"needle-seat-kit-un-captured-233-669-tnsks","title":"Tillotson 233-669 Un-Captured Needle Seat Kit - .093\" Orifice - Modified\/Open Class","description":"\u003cp\u003eWhen you are pushing high-displacement builds or converting to methanol, standard fuel delivery won't cut it—which is why upgrading your go karts and parts with the Tillotson 233-669 Un-Captured Needle Seat Kit is a critical step for maximizing flow. Designed specifically for Tillotson carburetors, this .093\" orifice \"alky seat\" is the largest in the Tillotson lineup, ensuring your engine receives the massive fuel volume required for aggressive track performance. Unlike captured designs, the un-captured needle allows for independent movement, making it ideal for four-cycle engines with upward-facing fuel inlets or experimental mounting angles.\u003c\/p\u003e\n\n\u003ch2\u003eUnleash the Best Engines with Maximum Fuel Flow\u003c\/h2\u003e\n\u003cp\u003eIf you want to run with the best engines in the Modified or Open classes, fuel starvation is your worst enemy. This kit eliminates that bottleneck. The .093\" orifice provides an unrestricted path for methanol or high-flow gas, allowing you to tune your air\/fuel ratio with absolute precision. Whether you are dialing in a big-bore piston port two-cycle or a high-output four-cycle kart engine, the 233-669 kit delivers the consistency needed to accelerate out of corners without hesitation. Just as you would upgrade to a premium go kart brake kit to out-brake the competition into the hairpin, upgrading your carburetor's needle and seat ensures you have the horsepower to pull away on the straightaways.\u003c\/p\u003e\n\n\u003ch2\u003eTrack-Tested Durability and Tuning Flexibility\u003c\/h2\u003e\n\u003cp\u003eTuning a race kart requires eliminating variables. This un-captured seat kit simplifies float level adjustments and makes trackside servicing incredibly fast. The included copper gasket ensures a leak-free seal under the extreme vibrations of competitive racing. While you are organizing your trailer accessories and mounting the best go kart tires for racing, having a reliable, high-flow carburetor setup means you spend less time wrenching in the pits and more time laying down blistering lap times.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e.093\" Maximum Flow Orifice:\u003c\/strong\u003e The largest fuel inlet available from Tillotson, perfect for methanol conversions and high-RPM gas engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUn-Captured Needle Design:\u003c\/strong\u003e Allows independent needle movement, ideal for upward-facing fuel inlets and custom carburetor orientations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethanol \u0026amp; Racing Fuel Compatible:\u003c\/strong\u003e Engineered to withstand the corrosive nature of aggressive racing fuels without degrading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Fuel Metering:\u003c\/strong\u003e Eliminates the rigidity of captured systems for highly accurate float level adjustments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-Free Copper Gasket:\u003c\/strong\u003e Includes a premium copper sealing ring to prevent fuel seepage under extreme engine vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Engine Application:\u003c\/strong\u003e Proven performance for big-bore 2-cycle, rotary valve, reed valve, and high-output 4-cycle racing engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid Trackside Servicing:\u003c\/strong\u003e Simplifies carburetor teardowns and jetting changes during high-pressure race day scenarios.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why should I choose an un-captured needle over a captured design?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e An un-captured needle allows for independent movement, which is essential if your carburetor is mounted at an angle or has an upward-facing fuel inlet. It prevents the needle from binding, ensuring consistent fuel flow regardless of the mounting orientation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the .093\" orifice suitable for gasoline engines?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e While this kit is the gold standard for methanol conversions due to the high volume of fuel required, it is also excellent for high-RPM, high-output gasoline engines that need to eliminate fuel starvation bottlenecks at wide-open throttle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include everything needed for installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The kit includes the .093\" needle and seat along with a premium copper gasket. This gasket is critical for creating a leak-free seal under the high-vibration environment of a racing kart engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does this kit affect my carburetor tuning?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e By providing a larger, unrestricted fuel path, this kit allows for more precise air\/fuel ratio tuning. Because it eliminates the rigidity of captured systems, it makes setting your float level more accurate and easier to adjust during trackside maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/needle-seat-kit-captured-233-665-tnsk\"\u003eCaptured Needle Seat Kit 233-665 for Alcohol Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-hi-speed-hl348e-43-966-til-43-966\"\u003eTillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-tfa\"\u003eTillotson HL\/HW Series Captured Fulcrum Arm - 155A-27 OEM Fuel Control Lever - All Classes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-spring-24b-299-tfas\"\u003eTillotson 24B-299 High-Pressure Fulcrum Arm Spring - 37 Gram Tension - OEM Carburetor Component\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562573852990,"sku":"TNSKS","price":10.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-needle-seat-kit-un-captured-233-669-tnsks.jpg?v=1763112118"},{"product_id":"adj-needle-hi-speed-hl348e-43-966-til-43-966","title":"Tillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class","description":"Dialing in the high-speed fuel circuit is the definitive difference between pulling away on the main straight and getting swallowed by the pack, which is why serious racers demand premium performance parts for their carburetors. The Tillotson HL348E High-Speed Adjustable Needle (OEM Part 43-966) is engineered to deliver surgical precision over your fuel mixture at wide-open throttle. When your butterfly valve is fully open, this needle dictates the exact volume of fuel entering the main discharge nozzle, allowing you to run on the ragged edge of lean for maximum RPM without risking detonation.\u003cbr\u003e\u003cbr\u003e\u003ch2\u003eOptimizing Your Engine and Motor Performance\u003c\/h2\u003e\u003cp\u003eIn the high-stakes environment of competitive karting, your engine and motor require meticulous fuel management to maintain peak volumetric efficiency. The HL348E needle features a precision-machined taper that provides linear, predictable flow adjustments. This eliminates the abrupt rich-to-lean transitions that plague inferior carburetors. By fine-tuning the high-side circuit, you ensure that your combustion chamber receives the optimal stoichiometric ratio, translating directly to higher trap speeds and sustained pulling power out of high-speed sweepers. Whether you are chasing maximum briggs and stratton lo206 horsepower in an open modified class or tuning a methanol-guzzling 2-stroke, this needle is your primary tool for top-end calibration.\u003c\/p\u003e\u003ch2\u003eEssential Mini Parts for Carburetor Tuning\u003c\/h2\u003e\u003cp\u003eSmall components often yield the most significant track-time reductions. Among the critical mini parts in your tuning arsenal, the high-speed needle is paramount. Track conditions, air density, and humidity shift constantly throughout a race weekend. The HL348E allows experienced tuners to make rapid, repeatable adjustments on the grid, ensuring the engine never falls out of its optimal power band.\u003c\/p\u003e\u003ch2\u003eBeyond Engine Bearings: The Secret to Top-End Speed\u003c\/h2\u003e\u003cp\u003eWhile builders obsess over low-friction engine bearings and blueprinted bottom ends, the ultimate limiting factor for top speed is fuel delivery. If your high-speed circuit is too rich, the engine will four-cycle and lay flat; too lean, and you risk a catastrophic meltdown. The Tillotson HL348E provides the granular control necessary to find the perfect sweet spot.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTechnical Specifications \u0026amp; Advantages:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Machined Taper:\u003c\/strong\u003e Ensures linear fuel flow adjustments for accurate high-RPM tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Tillotson Quality:\u003c\/strong\u003e Exact replacement for part 43-966, guaranteeing perfect thread pitch and seating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Resistant:\u003c\/strong\u003e Maintains secure settings even under the extreme harmonics of high-revving racing engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Fits a wide range of Tillotson HL-series carburetors used in karting and quarter midgets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Fuel Atomization:\u003c\/strong\u003e Promotes a more efficient burn, reducing the risk of engine fade during long green-flag runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstant Trackside Adjustability:\u003c\/strong\u003e Allows tuners to adapt to changing DA (Density Altitude) in seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Lean-Out Conditions:\u003c\/strong\u003e Protects your investment by ensuring adequate fuel delivery at sustained wide-open throttle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if my high-speed needle needs adjustment?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e If your engine is \"four-cycling\" or losing power at wide-open throttle, it is likely running too rich. If the engine hesitates or feels like it is losing power due to overheating, it may be too lean. Use this needle to make small, incremental adjustments to find the optimal fuel-to-air ratio for your track conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this needle for both gas and methanol setups?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the HL348E high-speed needle is designed for precision fuel management across various fuel types, including methanol and gasoline, provided you are using a compatible Tillotson HL-series carburetor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a direct replacement for my current needle?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This is an OEM Tillotson part (43-966). It is a direct, drop-in replacement for the high-speed needle on compatible HL-series carburetors, ensuring the correct thread pitch and seating for your specific unit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the best way to tune the high-speed circuit at the track?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Start with a baseline setting and make adjustments in small increments (1\/8th of a turn). Always monitor your engine temperature and plug color. Because air density and humidity change throughout the day, you should re-check your high-speed mixture before every session to maintain peak performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this needle come with the necessary O-ring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This product is the needle itself. We recommend inspecting your existing O-ring for wear or replacing it with a fresh adjuster needle O-ring to ensure a proper seal and prevent air leaks that could affect your tuning.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-low-speed-hl357a-43-388\"\u003ePrecision Adjustable Low-Speed Needle HL357A for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-o-ring-44-361-44-270-tno\"\u003eDurable Adjuster Needle O-Ring for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-washer-78a-256-tnw\"\u003eTillotson 78A-256 Brass Mixture Screw Washer - High\/Low Side - OEM Carburetor Part\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-hl334wx-gas-carb-clone-o-h-v-no-longer-available-from-tillotson-hl334wx\"\u003eTillotson HL334WX Gas Carburetor for Clone OHV Engines in Kart Racing\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562585321790,"sku":"TIL-43-966","price":10.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-adj-needle-hi-speed-hl348e-43-966-til-43-966.jpg?v=1763112323"},{"product_id":"top-cap-red-ttc-r","title":"Universal Red Top Cap for All-Fuel Tillotson Carburetors","description":"\u003cp\u003eWhy settle for fuel-specific limitations when you can have universal protection? The red top cap stands out as a multi-fuel champion, fitting seamlessly into your Tillotson setup to lock in efficiency.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAdapts to methanol, gasoline, or ethanol without corrosion risks.\u003c\/li\u003e\n\u003cli\u003eEnhances seal integrity for precise fuel metering and reduced waste.\u003c\/li\u003e\n\u003cli\u003eRed color facilitates easy spotting in your toolkit or during quick inspections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTrackside reliability starts here—this cap (SKU: TTC-R, OEM #91A-351R) prevents common issues like evaporation or contamination, directly boosting your kart's responsiveness and speed. In races where every ounce of power counts, it keeps your carburetor primed for victory.\u003c\/p\u003e\u003cp\u003eUsers appreciate its straightforward installation, which doesn't require special tools, allowing more time for tuning and testing. Pair it with other Tillotson parts for a cohesive system that delivers repeatable results lap after lap.\u003c\/p\u003e\u003cp\u003eFrom novice tracks to pro circuits, this versatile piece proves indispensable, helping you organize your pit area while pushing boundaries on the throttle.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this top cap compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This universal red top cap is designed to fit most standard Tillotson carburetors. It is an excellent upgrade for racers using methanol, gasoline, or ethanol, as the material is engineered to resist corrosion from various fuel types.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need special tools to install the TTC-R top cap?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No special tools are required. The cap is designed for straightforward installation, allowing you to quickly swap it out during trackside maintenance or tuning sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the red color significant for this component?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The vibrant red color is chosen for high visibility. It allows mechanics and drivers to quickly spot the component in a crowded toolkit or perform a rapid visual inspection of the carburetor setup while at the track.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this cap help with carburetor performance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, by enhancing seal integrity, this cap helps maintain consistent fuel metering and prevents common issues like fuel evaporation or contamination, which can directly improve your kart's throttle responsiveness.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-top-cap-screw-ttcs\"\u003eSecure Tillotson Top Cap Screw for Carburetor Assembly\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/top-cap-blue-ttc\"\u003eBlue Top Cap for Methanol-Compatible Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/cork-top-gasket-tcg\"\u003eSealing Cork Top Gasket for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl\"\u003eTillotson DG-4HL Diaphragm \u0026amp; Gasket Kit - Double Stack Carbs - OEM Spec\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/brass-screen-tbs\"\u003eHigh-Quality Brass Screen Filter for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562588139838,"sku":"TTC-R","price":8.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-top-cap-red-ttc-r.jpg?v=1763112363"},{"product_id":"tilt-fulcrum-arm-tfa","title":"Tillotson HL\/HW Series Captured Fulcrum Arm - 155A-27 OEM Fuel Control Lever - All Classes","description":"\u003cp\u003eWhen sourcing top-tier racing go kart parts, precision fuel delivery components like the Tillotson 155A-27 Captured Fulcrum Arm are non-negotiable for maintaining peak engine reliability. Engineered specifically for Tillotson HL, HR, HW, and HX series carburetors, this OEM fuel control lever translates minute throttle inputs into exact fuel mixture adjustments. In high-vibration racing environments, an uncaptured arm can flutter, causing fuel starvation or flooding. This captured forked design physically locks the inlet needle valve in place, guaranteeing a consistent fuel flow whether you are running gasoline or methanol.\u003c\/p\u003e\u003ch2\u003eOptimizing Your Go Kart Carburetor for Reliability\u003c\/h2\u003e\u003cp\u003eA well-tuned go kart carburetor is the beating heart of your racing engine. The fulcrum arm height dictates the pop-off pressure and fuel metering, directly impacting your power band. By installing this genuine Tillotson fulcrum arm, you eliminate the erratic fuel delivery often associated with worn or aftermarket levers. Whether you are building a new engine from scratch or restoring an older chassis you found when searching for a frame go kart for sale, replacing the fulcrum arm ensures your fuel system operates with factory-level precision.\u003c\/p\u003e\u003ch2\u003eBuilt for the Demands of the Track\u003c\/h2\u003e\u003cp\u003eDurability is paramount when pushing your kart to the absolute limit. This fulcrum arm is stamped and precision-machined from high-grade materials to resist fatigue, wear, and the corrosive effects of racing fuels. Just as you wouldn't compromise on your chassis setup or settle for anything less than the best go kart tires for racing, you shouldn't overlook the micro-mechanics of your carburetor. A reliable fuel circuit means fewer DNFs and more time spent at the front of the pack. Even when managing your go kart wheels tires between heats, knowing your engine will fire up and meter fuel flawlessly gives you the ultimate competitive advantage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaptured Fork Design:\u003c\/strong\u003e Securely locks the inlet needle valve to prevent fuel flutter under extreme track vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Tillotson Precision:\u003c\/strong\u003e Exact 155A-27 factory specifications guarantee accurate pop-off pressure and fuel metering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Fuel Compatibility:\u003c\/strong\u003e Engineered to perform flawlessly with both standard gasoline and aggressive methanol (alky) setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Carburetor Fitment:\u003c\/strong\u003e Seamlessly integrates with Tillotson HL, HR, HW, HX, and HM series carburetors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Throttle Response:\u003c\/strong\u003e Translates driver inputs into immediate, hesitation-free power delivery out of tight corners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFatigue-Resistant Construction:\u003c\/strong\u003e Machined from durable alloys to withstand the relentless harmonic vibrations of high-RPM kart engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrucial Tuning Component:\u003c\/strong\u003e Allows engine builders to set precise arm heights for optimal fuel circuit tuning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is a \"captured\" fulcrum arm better than a standard one?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e In high-vibration racing environments, a standard arm can flutter, leading to inconsistent fuel delivery. The captured design physically locks the inlet needle valve in place, preventing this flutter and ensuring steady fuel flow through the carburetor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the fulcrum arm height affect my engine's performance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The fulcrum arm height is critical for setting your carburetor's \"pop-off\" pressure. Adjusting this height changes how easily the needle valve opens, which directly impacts your fuel metering and the engine's power band.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this fulcrum arm compatible with methanol fuel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. This OEM Tillotson part is constructed from high-grade, fatigue-resistant materials designed to withstand the corrosive effects of both standard gasoline and aggressive methanol (alky) racing fuels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to replace the fulcrum arm spring when installing a new arm?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e While not always mandatory, it is highly recommended to inspect your spring during a rebuild. If your current spring has lost tension, replacing it alongside the fulcrum arm ensures your pop-off pressure remains consistent with factory specifications.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-spring-24b-299-tfas\"\u003eTillotson 24B-299 High-Pressure Fulcrum Arm Spring - 37 Gram Tension - OEM Carburetor Component\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/needle-seat-kit-captured-233-665-tnsk\"\u003eCaptured Needle Seat Kit 233-665 for Alcohol Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-iame-spec-orange-dg3-hw\"\u003eIAME Spec Orange Tillotson Diaphragm and Gasket Kit for Precision Tuning\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr\"\u003eOEM Tillotson Complete Rebuild Kit for Double Stack Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562590433598,"sku":"TFA","price":2.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tilt-fulcrum-arm-tfa.jpg?v=1763112400"},{"product_id":"top-cap-blue-ttc","title":"Blue Top Cap for Methanol-Compatible Tillotson Carbs","description":"\u003cul\u003e\n\u003cli\u003eSpecifically designed for methanol applications to resist chemical breakdown and extend component life.\u003c\/li\u003e\n\u003cli\u003eVersatile compatibility extends to gasoline and ethanol fuels without performance loss.\u003c\/li\u003e\n\u003cli\u003eSecure fit minimizes air ingress, stabilizing idle and full-throttle mixtures for consistent laps.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIn the high-stakes world of kart racing, fuel integrity is non-negotiable. This blue top cap (SKU: TTC, OEM #91A-351) shields your Tillotson carb from environmental hazards, keeping mixtures pure and engines firing on all cylinders.\u003c\/p\u003e\u003cp\u003eImagine pushing harder into turns knowing your carb is protected— this cap delivers that confidence, reducing downtime and letting you focus on winning. Its vibrant blue hue also aids quick visual identification during pit stops, streamlining your race-day organization.\u003c\/p\u003e\u003cp\u003eBeyond protection, it contributes to finer tuning by maintaining pressure equilibrium, which can translate to smoother power curves and faster overall times. Racers report noticeable improvements in throttle response after installation, proving its value in both practice and competition.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this top cap compatible with fuels other than methanol?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. While specifically engineered to resist the chemical breakdown associated with methanol, this cap is fully compatible with gasoline and ethanol fuels without any loss in performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the blue color significant for my carburetor setup?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The vibrant blue hue is designed for quick visual identification during high-pressure pit stops, helping you organize your race-day equipment and verify your setup at a glance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this cap help with engine tuning?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. By ensuring a secure fit that minimizes air ingress, this cap helps maintain pressure equilibrium within the carburetor, which can lead to more stable idle, consistent full-throttle mixtures, and improved throttle response.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a direct replacement for my current Tillotson cap?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This is an OEM-spec component (OEM #91A-351) designed for a precise fit on compatible Tillotson carburetors. Ensure your carburetor model is compatible with the standard Tillotson top cap design before installation.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-hl334wx-gas-carb-clone-o-h-v-no-longer-available-from-tillotson-hl334wx\"\u003eTillotson HL334WX Gas Carburetor for Clone OHV Engines in Kart Racing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-top-cap-screw-ttcs\"\u003eSecure Tillotson Top Cap Screw for Carburetor Assembly\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/cork-top-gasket-tcg\"\u003eSealing Cork Top Gasket for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/needle-seat-kit-captured-233-665-tnsk\"\u003eCaptured Needle Seat Kit 233-665 for Alcohol Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/top-cap-red-ttc-r\"\u003eUniversal Red Top Cap for All-Fuel Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562605703486,"sku":"TTC","price":5.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-top-cap-blue-ttc.jpg?v=1763112701"},{"product_id":"hl-flange-gasket-tfg","title":"HL Series Flange Gasket for 1.0\" Throttle Bore Tillotson Carbs","description":"\u003cp\u003ePrecision-engineered at .020\" thick, the TFG HL flange gasket (SKU: TFG) ensures a flawless interface for 1.0\" throttle bore carbs, preventing pressure loss that hampers acceleration.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIdeal for high-performance Tillotson HL models\u003c\/li\u003e\n\u003cli\u003eResists tearing under torque and vibration\u003c\/li\u003e\n\u003cli\u003ePromotes even manifold pressure for smoother power\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis gasket keeps your kart's intake sealed tight, aiding in faster corner speeds by maintaining consistent vacuum—essential for organized, high-speed racing.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the thickness of this gasket important for my Tillotson carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e At .020\" thick, this gasket is precision-engineered to provide the exact spacing required for a 1.0\" throttle bore. Using the correct thickness ensures a perfect seal, preventing air leaks that can cause lean conditions and inconsistent throttle response.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Should I use any sealant or gasket maker with this flange gasket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e For optimal performance, this gasket is designed to be installed dry. It is engineered to resist tearing and compression set under high vibration, providing a reliable seal on its own when the manifold bolts are torqued to manufacturer specifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my carburetor flange gasket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e You should inspect the gasket every time you remove the carburetor for maintenance or tuning. If the gasket shows signs of cracking, compression damage, or if you notice a vacuum leak around the intake manifold, it must be replaced to maintain consistent engine performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this gasket fit all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This specific gasket is designed for Tillotson HL models featuring a 1.0\" throttle bore. Always verify your carburetor model and bore size before installation to ensure a proper fit and seal.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-hl334wx-gas-carb-clone-o-h-v-no-longer-available-from-tillotson-hl334wx\"\u003eTillotson HL334WX Gas Carburetor for Clone OHV Engines in Kart Racing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-carb-manifold-silver-flathead-raptor-trm-s\"\u003eSilver Tillotson Carburetor Manifold for Raptor Flathead Karts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-carb-manifold-black-flathead-raptor-trm-bk\"\u003eBlack Tillotson Carburetor Manifold for Flathead Raptor Engines\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-throttle-shaft-tts\"\u003ePrecision Tillotson Throttle Shaft for Smooth Carb Operation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/cork-top-gasket-tcg\"\u003eSealing Cork Top Gasket for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562614419774,"sku":"TFG","price":2.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-hl-flange-gasket-tfg.jpg?v=1763112848"},{"product_id":"filter-adapter-for-hl348f-ec-319vs-hl348fa","title":"EC Carburetors EC-319VS Billet Velocity Stack - Tillotson HL-304WXA \u0026 HL-348 - Open\/Modified Class","description":"\u003ch2\u003ePrecision Airflow for Tillotson Carburetors\u003c\/h2\u003e\u003cp\u003eAs one of the premier go kart suppliers, we know that maximizing airflow into your Tillotson carburetor is the difference between pulling away on the straightaway and getting left in the dust. The EC Carburetors EC-319VS Billet Velocity Stack is engineered to replace restrictive standard filter adapters on Tillotson HL-304WXA, HL-348, HL-355, and HL-360 series carburetors. By utilizing a carefully contoured internal radius, this velocity stack smooths and accelerates the incoming air charge. This increased velocity boosts the carburetor signal, resulting in superior fuel atomization, crisper throttle response, and a broader powerband when you need it most.\u003c\/p\u003e\u003ch2\u003eBillet Aluminum Construction for High-Demand Racing\u003c\/h2\u003e\u003cp\u003eWhen you are turning high RPMs and demanding peak performance, plastic adapters simply flex and fail. CNC-machined from aerospace-grade 6061-T6 billet aluminum, the EC-319VS delivers unmatched strength and precision. The rigid mounting surface ensures a perfect seal against the carburetor body, preventing lean conditions caused by air leaks. Whether you are dialing in a fresh carb kit or optimizing your current setup, this velocity stack ensures consistent, reliable intake flow under the most extreme racing conditions.\u003c\/p\u003e\u003ch2\u003eSeamless Integration with Your Racing Setup\u003c\/h2\u003e\u003cp\u003eTuning a winning kart requires attention to every detail, from your engine drive belt tension to your tire pressures. The EC-319VS features a standard 2.5\" Outer Diameter (OD), allowing you to easily mount high-flow, clamp-on air filters. This streamlined integration keeps dirt and debris out of the venturi without sacrificing the volume of air your engine demands. While you might be focused on a go kart steering wheel upgrade for better handling, don't neglect the engine performance that gets you to the next corner faster. Pair this stack with premium go kart wheels tires to translate that newfound torque directly to the asphalt.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAerospace-Grade Billet Aluminum:\u003c\/strong\u003e CNC-machined from 6061-T6 aluminum for zero flex and maximum durability under vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Internal Radius:\u003c\/strong\u003e Smooths turbulent air, increasing velocity and boosting the carburetor fuel signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Precision fit for Tillotson HL-304WXA, HL-304WXG, HL-348D\/E, HL-355D\/E, and HL-360B\/C models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 2.5\" OD Fitment:\u003c\/strong\u003e Easily accepts standard high-flow clamp-on air filters for maximum protection and breathing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Throttle Response:\u003c\/strong\u003e Superior fuel atomization delivers punchy torque out of the corners and relentless top-end pull.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Hardware Kit:\u003c\/strong\u003e Includes all necessary 8-32 mounting bolts for a fast, secure, and leak-free installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRacing Application:\u003c\/strong\u003e Designed for high-demand open and modified classes (always check your local rulebook for velocity stack legality).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this velocity stack fit my Tillotson carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The EC-319VS is specifically engineered for the Tillotson HL-304WXA, HL-348, HL-355, and HL-360 series carburetors. Please verify your specific carburetor model number before purchasing to ensure a proper fit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this velocity stack come with the necessary mounting hardware?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the kit includes all required 8-32 mounting bolts to ensure a secure, leak-free installation directly to your carburetor body.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What size air filter should I use with this adapter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This velocity stack features a standard 2.5\" Outer Diameter (OD), which is designed to accommodate most standard high-flow, clamp-on racing air filters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why should I choose a billet aluminum stack over a plastic one?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Unlike plastic adapters that can flex or crack under high-RPM vibration, our 6061-T6 billet aluminum construction provides a rigid, durable mounting surface that prevents air leaks and maintains consistent intake geometry.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this velocity stack legal for all karting classes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This product is designed for high-demand open and modified racing classes. Because rules vary by track and organization, we strongly recommend checking your local rulebook to confirm velocity stack legality for your specific class.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\/products\/filter-adapter-for-hl334wxa-ec-306vs-hl334fa\"\u003eEC Carburetors 306VS Billet Velocity Stack \u0026amp; Filter Adapter - Tillotson HL-334WX - OHV Clone\u003c\/a\u003e\u003c\/p\u003e","brand":"EC Carburetors","offers":[{"title":"Default Title","offer_id":52562623398206,"sku":"HL348FA","price":29.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-filter-adapter-for-hl348f-ec-319vs-hl348fa.jpg?v=1763113059"},{"product_id":"idle-speed-screw-tiss","title":"Adjustable Idle Speed Screw for Tillotson Carburetors","description":"Fine-tune those crucial idle settings effortlessly—the TISS screw (SKU: TISS) threads into Tillotson carburetors to set optimal RPM, avoiding surges or drops that disrupt your race flow.\u003cul\u003e\n\u003cli\u003eRobust construction for repeated adjustments\u003c\/li\u003e\n\u003cli\u003eHelps achieve smooth transitions to full throttle\u003c\/li\u003e\n\u003cli\u003eEssential for maintaining engine health over long sessions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith reliable idle control, your kart stays organized at the grid, ready to launch without hesitation for that early lead advantage.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if my Tillotson carburetor is compatible with this idle speed screw?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This screw is designed for standard Tillotson carburetor bodies that utilize a threaded idle adjustment port. It is a universal fit for most racing-spec Tillotson units, but please verify your carburetor model has a matching thread pitch before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the best way to set my idle speed using this screw?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e With the engine at operating temperature, turn the screw clockwise to increase the idle RPM or counter-clockwise to decrease it. Adjust in small increments until the engine maintains a steady, consistent idle without engaging the clutch prematurely.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Should I use any thread locker on the idle speed screw?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Generally, no. The screw is designed to hold its position through tension. If you find the screw is vibrating out of adjustment due to engine harmonics, ensure the spring tension is adequate, but avoid permanent thread lockers that would prevent future trackside adjustments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my idle speed screw?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e You should inspect the screw during your routine carburetor rebuilds. If the threads appear worn, the tip is flattened, or the adjustment feels \"loose\" or inconsistent, it is time to replace it to ensure precise tuning.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-low-speed-hl357a-43-388\"\u003ePrecision Adjustable Low-Speed Needle HL357A for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-hi-speed-hl348e-43-966-til-43-966\"\u003eTillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-o-ring-44-361-44-270-tno\"\u003eDurable Adjuster Needle O-Ring for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-washer-78a-256-tnw\"\u003eTillotson 78A-256 Brass Mixture Screw Washer - High\/Low Side - OEM Carburetor Part\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562629591358,"sku":"TISS","price":6.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-idle-speed-screw-tiss.jpg?v=1763113197"},{"product_id":"adjuster-needle-washer-78a-256-tnw","title":"Tillotson 78A-256 Brass Mixture Screw Washer - High\/Low Side - OEM Carburetor Part","description":"\u003cp\u003eSecuring a leak-free fuel circuit is the most critical step in any go karts supply rebuild, and the Tillotson 78A-256 Brass Mixture Screw Washer is the exact hardware required to protect your carburetor's O-rings. Designed to sit perfectly between your fuel adjustment needle spring and the O-ring, this OEM brass washer prevents the spring from tearing, crushing, or deforming the seal during high-vibration racing conditions. When you are pushing the limits on the track, a compromised fuel circuit seal can lead to disastrous lean conditions or erratic RPMs.\u003c\/p\u003e\u003ch2\u003eExact Parts Number for Tillotson Carburetors\u003c\/h2\u003e\u003cp\u003eFinding the correct parts number is vital when rebuilding your kart's fuel system. The 78A-256 is the exact OEM replacement for most Tillotson carburetors, including the HL, HB, HX, HM, and HW models. By distributing pressure evenly across the O-ring, this brass washer ensures a leak-free seal on both the high and low-speed fuel circuits. Whether you are sourcing components from a local go karts shop near me or ordering specialized comet parts online, insisting on genuine Tillotson hardware guarantees your tuning adjustments remain locked in place.\u003c\/p\u003e\u003ch2\u003ePrecision Tuning and Reliability\u003c\/h2\u003e\u003cp\u003eDon't let a missing or worn washer ruin your race weekend. If you've been searching for go karts for sale near me, you already know that maintaining a high-performance machine requires attention to the smallest details. This washer facilitates easy disassembly for cleaning and supports the fine-tune adjustments necessary for optimal RPM output.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Tillotson Quality:\u003c\/strong\u003e Genuine 78A-256 replacement guarantees exact fitment and reliable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Ring Protection:\u003c\/strong\u003e Acts as a solid barrier, preventing the adjustment spring from cutting into the rubber O-ring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-Free Seal:\u003c\/strong\u003e Maintains critical pressure on the fuel circuits to prevent air leaks and fuel starvation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Fits the high and low-speed adjustable mixture screws on HL, HB, HX, HM, and HW carburetors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion-Resistant Brass:\u003c\/strong\u003e Withstands harsh racing fuels and extreme engine temperatures without degrading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Tuning:\u003c\/strong\u003e Locks in your adjuster needle positions so your engine stays responsive through every chicane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Maintenance:\u003c\/strong\u003e Facilitates quick, hassle-free disassembly when cleaning or rebuilding your carburetor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Where exactly does the 78A-256 brass washer sit in the carburetor assembly?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This washer is designed to be placed on the mixture screw between the tension spring and the rubber O-ring. It acts as a protective barrier to ensure the spring does not dig into or deform the O-ring during adjustment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is it important to use a brass washer instead of a standard steel one?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Brass is corrosion-resistant and provides the ideal surface hardness to protect the O-ring from the spring's tension without causing premature wear or chemical degradation when exposed to racing fuels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this washer fit my Tillotson carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The 78A-256 is a standard OEM component compatible with most Tillotson HL, HB, HX, HM, and HW series carburetors. It is the correct size for both high and low-speed mixture screw assemblies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Should I replace this washer every time I rebuild my carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. If you are replacing your O-rings and springs during a rebuild, you should always inspect the washer. If it shows signs of grooving or deformation, it must be replaced to ensure a consistent, leak-free seal.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-o-ring-44-361-44-270-tno\"\u003eDurable Adjuster Needle O-Ring for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-low-speed-hl357a-43-388\"\u003ePrecision Adjustable Low-Speed Needle HL357A for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-hi-speed-hl348e-43-966-til-43-966\"\u003eTillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr\"\u003eOEM Tillotson Complete Rebuild Kit for Double Stack Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562632147262,"sku":"TNW","price":1.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-adjuster-needle-washer-78a-256-tnw.jpg?v=1763113261"},{"product_id":"cork-top-gasket-tcg","title":"Sealing Cork Top Gasket for Tillotson Carburetors","description":"\u003cstrong\u003eSeal the deal on performance:\u003c\/strong\u003e The TCG cork top gasket (SKU: TCG, Tillotson OEM #16B-205) compresses perfectly against carb tops, blocking unwanted air that dilutes fuel mixtures and saps power.\u003cul\u003e\n\u003cli\u003eFlexible cork composition adapts to minor surface irregularities\u003c\/li\u003e\n\u003cli\u003eWithstands heat and pressure from racing demands\u003c\/li\u003e\n\u003cli\u003eQuick to install for fast track prep\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt helps your kart idle steadily and accelerate sharply, keeping your setup tidy and race-focused for those critical overtakes.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is a cork gasket preferred for the carburetor top?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Cork is a flexible, compressible material that excels at sealing against uneven surfaces. It conforms to minor irregularities on the carburetor body, ensuring an airtight seal that prevents air leaks which could otherwise lean out your fuel mixture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if my top gasket needs replacing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e If you notice an erratic idle, difficulty tuning your carburetor, or visible fuel residue around the top cap, your gasket may be compromised. If the gasket appears brittle, cracked, or flattened, it should be replaced to maintain optimal engine performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is any sealant required when installing this cork gasket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Generally, no. This gasket is designed to be installed dry. Ensure both the carburetor top and the cap surfaces are clean and free of old gasket material or debris before installation to ensure a proper seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse this gasket after opening the carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is highly recommended to use a fresh gasket every time the carburetor top is removed. Once a cork gasket has been compressed, it loses its ability to seal effectively if reinstalled.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/top-cap-red-ttc-r\"\u003eUniversal Red Top Cap for All-Fuel Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/top-cap-blue-ttc\"\u003eBlue Top Cap for Methanol-Compatible Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-top-cap-screw-ttcs\"\u003eSecure Tillotson Top Cap Screw for Carburetor Assembly\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr\"\u003eOEM Tillotson Complete Rebuild Kit for Double Stack Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/hl-flange-gasket-tfg\"\u003eHL Series Flange Gasket for 1.0\" Throttle Bore Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562633425214,"sku":"TCG","price":1.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-cork-top-gasket-tcg.jpg?v=1763113292"},{"product_id":"tillotson-top-cap-screw-ttcs","title":"Secure Tillotson Top Cap Screw for Carburetor Assembly","description":"Secure every turn with confidence—the TTCS top cap screw (SKU: TTCS) clamps down firmly on Tillotson carb tops, resisting track shakes that could misalign jets and rob efficiency.\u003cul\u003e\n\u003cli\u003eThreaded for strong, reusable hold\u003c\/li\u003e\n\u003cli\u003eCorrosion-proof for wet or dusty environments\u003c\/li\u003e\n\u003cli\u003eSupports stable metering arm operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis simple fastener organizes your carb's top end, ensuring vibrations don't translate to performance dips, so you can push limits without worry.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is it important to use a specific Tillotson top cap screw instead of a generic hardware store bolt?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Tillotson carburetors are subject to intense high-frequency vibrations on the track. This screw is engineered to maintain consistent clamping force, preventing the top cap from loosening, which could otherwise lead to air leaks, jet misalignment, and inconsistent engine performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How tight should I torque the top cap screw during installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e You should tighten the screw until it is snug and the top cap is fully seated against the carburetor body. Avoid over-tightening, as this can strip the threads in the carburetor housing or crack the top cap. A firm, hand-tight fit is usually sufficient for these components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Should I use thread locker on this screw?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e While the screw is designed for a secure hold, many racers choose to use a small drop of blue (medium strength) thread locker to ensure the screw does not back out due to extreme engine vibration. Avoid red (permanent) thread locker, as it will make future carburetor maintenance difficult.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my carburetor hardware?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is good practice to inspect your carburetor hardware during every rebuild or if you notice the screw head showing signs of wear or rounding. If the threads appear damaged or the screw no longer holds tension, replace it immediately to prevent mid-race failures.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/top-cap-red-ttc-r\"\u003eUniversal Red Top Cap for All-Fuel Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/top-cap-blue-ttc\"\u003eBlue Top Cap for Methanol-Compatible Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/cork-top-gasket-tcg\"\u003eSealing Cork Top Gasket for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-pumper-screw-single-stack-carb-only-tps\"\u003eGenuine Tillotson Pumper Screw for Single Stack Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-throttle-return-spring-ttrs\"\u003eDurable Tillotson Throttle Return Spring 24B-381\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562633589054,"sku":"TTCS","price":1.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tillotson-top-cap-screw-ttcs.jpg?v=1763113298"},{"product_id":"brass-screen-tbs","title":"High-Quality Brass Screen Filter for Tillotson Carburetors","description":"Imagine debris turning a winning run into a breakdown—this brass screen (SKU: TBS) acts as your first line of defense in Tillotson carburetors, capturing particles before they reach sensitive jets.\u003cul\u003e\n\u003cli\u003eMade from robust brass for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eFits seamlessly into standard carb housings\u003c\/li\u003e\n\u003cli\u003ePromotes steady fuel delivery for consistent acceleration\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBy keeping internals clean, it organizes your maintenance routine, reducing downtime and letting you focus on shaving seconds off laps with a trouble-free engine.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is a brass screen filter necessary for my Tillotson carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Even microscopic debris can clog the precision jets in your carburetor, leading to fuel starvation or inconsistent engine performance. This brass screen acts as a critical barrier, catching contaminants before they enter the internal fuel circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I inspect or replace the carburetor screen?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is recommended to inspect the screen during every major engine service or whenever you perform a carburetor rebuild. If you notice any signs of debris buildup or if the screen appears damaged or deformed, replace it immediately to ensure steady fuel flow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this screen compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This screen is designed to fit standard Tillotson carburetor housings. It is a universal maintenance component for most Tillotson models, but always verify your specific carburetor housing design to ensure a seamless fit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I clean the brass screen instead of replacing it?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e While the brass material is corrosion-resistant and can sometimes be cleaned with carburetor cleaner and compressed air, any physical damage to the mesh can allow debris to pass through. Given the low cost of the part, replacing it during a rebuild is the safest way to prevent engine downtime.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-hl334wx-gas-carb-clone-o-h-v-no-longer-available-from-tillotson-hl334wx\"\u003eTillotson HL334WX Gas Carburetor for Clone OHV Engines in Kart Racing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-iame-spec-orange-rk6-hw\"\u003eIAME Spec Orange Complete Tillotson Rebuild Kit for Elite Kart Performance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-p8-mrk\"\u003eComplete Tillotson Rebuild Kit for 3-Plate Double Stack EC Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr\"\u003eOEM Tillotson Complete Rebuild Kit for Double Stack Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl\"\u003eTillotson DG-4HL Diaphragm \u0026amp; Gasket Kit - Double Stack Carbs - OEM Spec\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562638864702,"sku":"TBS","price":1.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-brass-screen-tbs.jpg?v=1763113405"},{"product_id":"adj-needle-low-speed-hl357a-43-388","title":"Precision Adjustable Low-Speed Needle HL357A for Tillotson Carbs","description":"\u003cp\u003eUnlock smoother engine starts and consistent low-end power in your kart with the HL357A adjustable needle. Designed specifically for Tillotson carburetors, this component allows racers to dial in the perfect fuel-air mix at low speeds, preventing bogging down during tight corner exits or slow-speed maneuvers.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEnhances throttle response for immediate power delivery\u003c\/li\u003e\n\u003cli\u003eReduces hesitation, helping you maintain momentum on the track\u003c\/li\u003e\n\u003cli\u003eBuilt from durable materials to withstand high-vibration racing conditions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWhether you're tweaking for alcohol or gasoline setups, integrating this needle (SKU: 43-388) into your carburetor can shave seconds off your lap times by ensuring optimal combustion efficiency. Kart engineers swear by such precise tuning aids for dominating local races or national events. Pair it with regular maintenance for a responsive engine that keeps you ahead of the pack.\u003c\/p\u003e\u003cp\u003eInstallation is straightforward, requiring basic tools, and the results are immediate—faster warm-ups and reliable performance every time you hit the throttle.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if my Tillotson carburetor needs a new low-speed needle?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e If your kart is experiencing hesitation, bogging down during corner exits, or if you are unable to achieve a stable idle despite adjusting your current settings, the needle tip may be worn or damaged. Replacing it with the HL357A needle can restore precise fuel metering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this needle compatible with both gasoline and alcohol fuel setups?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this adjustable needle is designed to handle the tuning requirements for both gasoline and alcohol (methanol) setups, allowing you to dial in the specific fuel-air ratio needed for your engine's performance class.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need special tools to install the HL357A needle?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, installation is straightforward and requires only basic hand tools. Ensure the carburetor is clean before removal, and be careful not to overtighten the needle when seating it to avoid damaging the needle tip or the carburetor body.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I tune the low-speed needle for optimal performance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Start by gently seating the needle and backing it out to the manufacturer's recommended baseline. From there, make small, incremental adjustments while the engine is at operating temperature. Listen for a crisp throttle response without hesitation when you blip the throttle from a low RPM.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-hi-speed-hl348e-43-966-til-43-966\"\u003eTillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-o-ring-44-361-44-270-tno\"\u003eDurable Adjuster Needle O-Ring for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-washer-78a-256-tnw\"\u003eTillotson 78A-256 Brass Mixture Screw Washer - High\/Low Side - OEM Carburetor Part\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/idle-speed-screw-tiss\"\u003eAdjustable Idle Speed Screw for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562642043198,"sku":"43-388","price":7.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-adj-needle-low-speed-hl357a-43-388.jpg?v=1763113477"},{"product_id":"adjuster-needle-o-ring-44-361-44-270-tno","title":"Durable Adjuster Needle O-Ring for Tillotson Carburetors","description":"\u003cp\u003eEver notice fuel seeping where it shouldn't? This O-ring for the adjuster needle provides a tight, reliable seal in Tillotson carburetors, compatible with 44-361 and 44-270 setups (SKU: TNO). It prevents air leaks that disrupt mixture ratios, ensuring your engine runs clean and strong from the first lap.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eResists degradation from fuels and vibrations\u003c\/li\u003e\n\u003cli\u003eEasy replacement during routine carb servicing\u003c\/li\u003e\n\u003cli\u003eHelps sustain consistent idle and throttle response\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBy keeping everything sealed, it indirectly boosts your kart's speed by allowing accurate tuning without constant corrections. Ideal for trackside fixes to minimize prep time and maximize racing sessions.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if my adjuster needle O-ring needs to be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e If you notice fuel seeping around the needle adjustment screw or if your engine experiences erratic idle and inconsistent throttle response, the O-ring may be worn or cracked. Replacing it restores the seal and prevents air leaks that disrupt your fuel-to-air mixture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this O-ring compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This specific O-ring is designed for Tillotson carburetors utilizing 44-361 and 44-270 setups. Always check your specific carburetor model or manual to ensure compatibility before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need any special tools to install this O-ring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No special tools are required. It is a straightforward replacement during routine carburetor maintenance. Ensure the needle area is clean of debris before seating the new O-ring to ensure a proper, airtight seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this O-ring withstand high-performance racing fuels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this O-ring is engineered to resist degradation from common racing fuels and the high-vibration environment of kart racing, ensuring long-term durability and consistent tuning.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-hi-speed-hl348e-43-966-til-43-966\"\u003eTillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-low-speed-hl357a-43-388\"\u003ePrecision Adjustable Low-Speed Needle HL357A for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-washer-78a-256-tnw\"\u003eTillotson 78A-256 Brass Mixture Screw Washer - High\/Low Side - OEM Carburetor Part\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/idle-speed-screw-tiss\"\u003eAdjustable Idle Speed Screw for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562647941438,"sku":"TNO","price":1.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-adjuster-needle-o-ring-44-361-44-270-tno.jpg?v=1763113580"},{"product_id":"tillotson-throttle-shaft-tts","title":"Precision Tillotson Throttle Shaft for Smooth Carb Operation","description":"\u003cstrong\u003eThrottle lag killing your momentum?\u003c\/strong\u003e Replace it with the TTS throttle shaft (SKU: TTS), engineered for Tillotson carbs to rotate fluidly, linking your foot to full power without delay or slop.\u003cp\u003eWhy it transforms your ride:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMachined tolerances reduce friction for quicker opens\u003c\/li\u003e\n\u003cli\u003eBushings included for immediate install and longevity\u003c\/li\u003e\n\u003cli\u003eWithstands heat expansion without binding\u003c\/li\u003e\n\u003cli\u003eEnhances pedal feel for intuitive speed modulation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIn kart racing, where split-second decisions define races, this shaft organizes your control inputs, allowing aggressive entries into corners followed by explosive exits. Mechanics note its role in preventing uneven wear on butterflies, extending component life and keeping maintenance schedules tight. For alcohol or gas setups, it adapts seamlessly, boosting overall engine harmony. Visualize threading the needle through a slalom— this shaft makes it possible by ensuring every twist of the wrist yields precise airflow, ultimately clocking faster sectors. Paired with fresh linkages, it elevates your kart from contender to champion, all while simplifying diagnostics in the paddock.\u003c\/p\u003e\u003cp\u003eDon't overlook this core piece; it's the silent hero behind podium finishes.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this throttle shaft come with the necessary bushings for installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the kit includes the required bushings to ensure a smooth, long-lasting fit and to eliminate slop in your throttle operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does a new throttle shaft improve my kart's performance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e By reducing friction and preventing binding caused by heat expansion, this shaft provides a more intuitive pedal feel, allowing for precise airflow control and faster, more consistent lap times.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this shaft compatible with both gas and alcohol carburetor setups?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the TTS throttle shaft is engineered to adapt seamlessly to both gas and alcohol configurations, maintaining engine harmony in either setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will replacing the throttle shaft help with uneven butterfly wear?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Absolutely. A precision-machined shaft ensures the butterfly plate sits correctly, which prevents uneven wear and extends the overall service life of your carburetor components.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-throttle-return-spring-ttrs\"\u003eDurable Tillotson Throttle Return Spring 24B-381\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-hl334wx-gas-carb-clone-o-h-v-no-longer-available-from-tillotson-hl334wx\"\u003eTillotson HL334WX Gas Carburetor for Clone OHV Engines in Kart Racing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/hl-flange-gasket-tfg\"\u003eHL Series Flange Gasket for 1.0\" Throttle Bore Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/idle-speed-screw-tiss\"\u003eAdjustable Idle Speed Screw for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tpp-lk-156-throttle-linkage-kit-for-72mm-block-lk-156\"\u003eTillotson LK-156 Throttle Linkage Kit - 72mm \u0026amp; 76mm Blocks - Stock Appearing\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562656133438,"sku":"TTS","price":18.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tillotson-throttle-shaft-tts.jpg?v=1763113761"},{"product_id":"tillotson-throttle-return-spring-ttrs","title":"Durable Tillotson Throttle Return Spring 24B-381","description":"\u003cp\u003eFeel the difference in throttle discipline—the TTRS spring (SKU: TTRS, Tillotson OEM #24B-381) pulls the lever back swiftly, promoting controlled power application that keeps your kart balanced during aggressive maneuvers.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh-tension wire for reliable snap return\u003c\/li\u003e\n\u003cli\u003eResists fatigue from constant track abuse\u003c\/li\u003e\n\u003cli\u003eAids in consistent lap times via predictable response\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBy organizing throttle behavior, it helps avoid wheel spin on exits, channeling power efficiently for speed gains without sacrificing cornering grip.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is a high-tension throttle return spring important for kart racing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A high-tension spring ensures the throttle lever returns to the idle position instantly when you lift off the pedal. This provides a predictable, snappy response that helps you maintain better control during aggressive cornering and prevents the engine from hanging at high RPMs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the Tillotson 24B-381 spring compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This spring is specifically designed for Tillotson applications requiring the 24B-381 specification. Always check your carburetor model or original parts manual to ensure compatibility with your specific linkage setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if my throttle return spring needs to be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e If you notice your throttle feels \"mushy,\" slow to return to idle, or if the spring shows signs of stretching or fatigue, it should be replaced immediately. A weak spring can lead to inconsistent lap times and safety issues on the track.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this spring help with wheel spin on corner exits?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. By providing a consistent and predictable throttle return, this spring allows for smoother, more controlled power application. This helps you manage your power delivery more effectively, reducing the likelihood of unwanted wheel spin when exiting a corner.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-throttle-shaft-tts\"\u003ePrecision Tillotson Throttle Shaft for Smooth Carb Operation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tpp-lk-156-throttle-linkage-kit-for-72mm-block-lk-156\"\u003eTillotson LK-156 Throttle Linkage Kit - 72mm \u0026amp; 76mm Blocks - Stock Appearing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-spring-24b-299-tfas\"\u003eTillotson 24B-299 High-Pressure Fulcrum Arm Spring - 37 Gram Tension - OEM Carburetor Component\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-hl334wx-gas-carb-clone-o-h-v-no-longer-available-from-tillotson-hl334wx\"\u003eTillotson HL334WX Gas Carburetor for Clone OHV Engines in Kart Racing\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562658328894,"sku":"TTRS","price":4.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tillotson-throttle-return-spring-ttrs.jpg?v=1763113812"},{"product_id":"needle-seat-kit-captured-233-665-tnsk","title":"Captured Needle Seat Kit 233-665 for Alcohol Tillotson Carbs","description":"\u003cp\u003eFor alcohol-powered karts with inverted carb mounts, the captured needle seat kit (SKU: TNSK, 233-665) locks in place to deliver unwavering fuel control, including one 16B-199 copper base gasket for superior sealing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e.093\" orifice optimizes flow for alcohol blends\u003c\/li\u003e\n\u003cli\u003e.535\" height suits single-stack configurations\u003c\/li\u003e\n\u003cli\u003ePrevents needle pop-out under extreme G-forces\u003c\/li\u003e\n\u003cli\u003eEnhances shutoff reliability to avoid flooding\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis kit shines in scenarios where vibrations threaten standard seats, ensuring your engine receives metered fuel for explosive acceleration and sustained top speeds. Tuners praise its role in adapting to track elevations, where consistent delivery means gaining positions lap after lap. Installation involves basic carb disassembly, yielding a setup that's both organized and primed for victory. By stabilizing the needle, it indirectly organizes your pit routine, cutting diagnostic time and letting you race more.\u003c\/p\u003e\u003cp\u003eWhether chasing club points or pro podiums, this captured design elevates your Tillotson carb's efficiency, turning potential weaknesses into strengths on the circuit.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why should I choose a captured needle seat over a standard one?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The captured design physically locks the seat in place, preventing it from vibrating loose or popping out under the extreme G-forces experienced in kart racing. This ensures consistent fuel delivery and prevents engine flooding.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this kit compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This kit is specifically designed for alcohol-powered Tillotson carburetors with a .535\" height requirement for single-stack configurations. Please verify your carburetor model and current seat height before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include everything needed for installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the kit includes the captured needle seat and one 16B-199 copper base gasket to ensure a superior, leak-free seal during assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the .093\" orifice size affect performance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The .093\" orifice is optimized for alcohol fuel blends, providing the necessary flow rate to support the fuel demands of high-performance racing engines, helping to maintain consistent power through acceleration and top-end speeds.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/needle-seat-kit-un-captured-233-669-tnsks\"\u003eTillotson 233-669 Un-Captured Needle Seat Kit - .093\" Orifice - Modified\/Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-tfa\"\u003eTillotson HL\/HW Series Captured Fulcrum Arm - 155A-27 OEM Fuel Control Lever - All Classes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-spring-24b-299-tfas\"\u003eTillotson 24B-299 High-Pressure Fulcrum Arm Spring - 37 Gram Tension - OEM Carburetor Component\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl\"\u003eTillotson DG-4HL Diaphragm \u0026amp; Gasket Kit - Double Stack Carbs - OEM Spec\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562661736766,"sku":"TNSK","price":9.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-needle-seat-kit-captured-233-665-tnsk.jpg?v=1763113908"},{"product_id":"tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr","title":"OEM Tillotson Complete Rebuild Kit for Double Stack Carburetors","description":"\u003cul\u003e\n\u003cli\u003eAuthentic OEM quality for double stack Tillotson carbs\u003c\/li\u003e\n\u003cli\u003eComprehensive kit covering all essential rebuild components\u003c\/li\u003e\n\u003cli\u003eEnsures factory-spec performance post-installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBring your double stack carburetor back to life with the OEM Tillotson RK-104HLR complete rebuild kit, a must-have for serious kart racers. This kit restores optimal fuel atomization and airflow, directly enhancing throttle sharpness and overall engine power – key to pulling ahead in sprints.\u003c\/p\u003e\u003cp\u003eIn the heat of competition, a well-maintained carb means fewer hesitations and more consistent laps. The genuine parts guarantee compatibility and longevity, preventing issues like rich mixtures that rob speed. For pit crews, it's a streamlined way to organize maintenance schedules, keeping multiple engines in top shape without guesswork.\u003c\/p\u003e\u003cp\u003eDelve into its value: from metering needles to sealing gaskets, every element is precision-crafted to handle high-RPM abuse. SKU: RK-104HLR. Users rave about the ease of assembly, often completing rebuilds in under an hour, freeing up time for track testing and tweaks that fine-tune your kart's handling.\u003c\/p\u003e\u003cp\u003eBeyond basics, this kit supports advanced tuning, allowing adjustments for different classes or fuel types, ultimately contributing to a more versatile and faster machine.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I rebuild my Tillotson double stack carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e For competitive kart racing, it is recommended to rebuild your carburetor every 3-5 race weekends or whenever you notice a drop in throttle response or inconsistent engine performance. Regular maintenance prevents fuel mixture issues that can rob your engine of power.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include everything needed for a full rebuild?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the RK-104HLR is a comprehensive kit containing all essential components, including metering needles, diaphragms, and sealing gaskets, specifically designed to restore factory-spec performance to your double stack carburetor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this kit compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, this kit is specifically engineered for Tillotson double stack carburetors. Please verify your carburetor model before purchase to ensure compatibility.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long does it typically take to install this rebuild kit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Most experienced pit crews and racers can complete a full carburetor rebuild using this kit in under an hour, allowing you more time for track testing and fine-tuning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this kit help with engine hesitation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Absolutely. By replacing worn internal components like diaphragms and needles, you restore proper fuel atomization and airflow, which directly eliminates hesitations and ensures consistent, sharp throttle response.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl\"\u003eTillotson DG-4HL Diaphragm \u0026amp; Gasket Kit - Double Stack Carbs - OEM Spec\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-spring-24b-299-tfas\"\u003eTillotson 24B-299 High-Pressure Fulcrum Arm Spring - 37 Gram Tension - OEM Carburetor Component\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-tfa\"\u003eTillotson HL\/HW Series Captured Fulcrum Arm - 155A-27 OEM Fuel Control Lever - All Classes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-o-ring-44-361-44-270-tno\"\u003eDurable Adjuster Needle O-Ring for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/brass-screen-tbs\"\u003eHigh-Quality Brass Screen Filter for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562670420286,"sku":"RK-104HLR","price":24.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr.jpg?v=1763114093"},{"product_id":"welch-plug-375-til179-55","title":"0.375 Inch Welch Plug for Tillotson Carburetor Sealing","description":"\u003cp\u003ePrecision sealing transforms a good carb into a great one—enter the 0.375-inch Welch plug, your go-to for plugging idle circuits or calibration holes effectively.\u003c\/p\u003e\u003cp\u003eThis OEM Tillotson part (SKU: TIL179-55) installs with minimal effort using basic tools, yet delivers maximum impact by isolating passages to fine-tune your engine's behavior.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExact 0.375\" diameter for snug, leak-proof fit in standard ports.\u003c\/li\u003e\n\u003cli\u003eProtects against dirt ingress, preserving internal cleanliness.\u003c\/li\u003e\n\u003cli\u003eSupports experimental jetting setups for personalized power gains.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eOn the track, that means crisper throttle response and fewer stalls, helping you stay ahead of the pack.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if I need to replace my Welch plug?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e If you notice fuel leaking from the carburetor body or if your engine is experiencing inconsistent idle and tuning issues that cannot be resolved by adjusting the needles, the Welch plug may be loose or damaged, requiring a replacement to restore the seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What tools are required to install this 0.375-inch Welch plug?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Installation is straightforward. You will typically need a small punch or a specialized seating tool to gently tap the plug into the port until it is flush and slightly concave, which expands the edges to create a secure, leak-proof seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this plug be used for custom carburetor modifications?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this plug is ideal for racers performing custom tuning. It is commonly used to seal off idle circuits or calibration holes when experimenting with different jetting setups to achieve personalized power gains.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this plug compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This is a 0.375-inch diameter plug. Please verify the specific port size on your carburetor model, as Tillotson carburetors use various plug sizes depending on the circuit design.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/welch-plug-500-til179-63\"\u003e0.500 Inch Welch Plug for Reliable Tillotson Carb Sealing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-iame-spec-orange-rk6-hw\"\u003eIAME Spec Orange Complete Tillotson Rebuild Kit for Elite Kart Performance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-iame-spec-orange-dg3-hw\"\u003eIAME Spec Orange Tillotson Diaphragm and Gasket Kit for Precision Tuning\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-hi-speed-hl348e-43-966-til-43-966\"\u003eTillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/brass-screen-tbs\"\u003eHigh-Quality Brass Screen Filter for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562674286910,"sku":"TIL179-55","price":4.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-welch-plug-375-til179-55.jpg?v=1763114163"},{"product_id":"welch-plug-500-til179-63","title":"0.500 Inch Welch Plug for Reliable Tillotson Carb Sealing","description":"\u003cul\u003e\n\u003cli\u003eLarger 0.500\" size targets bigger ports for comprehensive coverage.\u003c\/li\u003e\n\u003cli\u003eOEM quality guarantees deformation resistance under heat and vibration.\u003c\/li\u003e\n\u003cli\u003eFacilitates custom configurations without compromising integrity.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eDon't let minor leaks sabotage your setup; this plug (SKU: TIL179-63) hammers home airtight seals that keep your Tillotson carb humming efficiently.\u003c\/p\u003e\u003cp\u003eIdeal for those tweaking for specific track conditions, it empowers precise adjustments, resulting in engines that rev cleaner and pull harder out of turns.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the purpose of a 0.500 inch Welch plug in a Tillotson carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The Welch plug acts as a permanent seal for the fuel circuit access ports in your carburetor body. It ensures the internal passages remain airtight, which is critical for maintaining proper fuel pressure and consistent engine performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if I need to replace my Welch plug?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e You should replace the plug if you notice fuel leaking from the port, if the plug has been deformed during a previous removal, or if you are performing a full carburetor rebuild to ensure a fresh, airtight seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the best way to install this 0.500\" Welch plug?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e To install, place the plug into the port with the convex side facing outward. Use a flat-faced punch that is slightly smaller than the plug diameter to gently tap the center of the plug until it flattens out. This expansion creates the interference fit necessary to lock it into the carburetor body.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse a Welch plug after removing it?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. Welch plugs are designed to be deformed during installation to create a seal. Once removed, they lose their structural integrity and shape, meaning they cannot provide a reliable, leak-proof seal a second time.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/welch-plug-375-til179-55\"\u003e0.375 Inch Welch Plug for Tillotson Carburetor Sealing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl\"\u003eTillotson DG-4HL Diaphragm \u0026amp; Gasket Kit - Double Stack Carbs - OEM Spec\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/brass-screen-tbs\"\u003eHigh-Quality Brass Screen Filter for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-o-ring-44-361-44-270-tno\"\u003eDurable Adjuster Needle O-Ring for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-washer-78a-256-tnw\"\u003eTillotson 78A-256 Brass Mixture Screw Washer - High\/Low Side - OEM Carburetor Part\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562674319678,"sku":"TIL179-63","price":4.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-welch-plug-500-til179-63.jpg?v=1763114164"},{"product_id":"tillotson-complete-rebuild-kit-iame-spec-orange-rk6-hw","title":"IAME Spec Orange Complete Tillotson Rebuild Kit for Elite Kart Performance","description":"\u003cp\u003eStep up your game with the IAME spec orange RK6-HW complete rebuild kit from Tillotson, a powerhouse package for carburetors demanding the best. This all-in-one solution features vibrant orange components that scream performance, engineered to revive your setup with OEM-level accuracy and beyond.\u003c\/p\u003e\u003cp\u003eThe magic lies in its comprehensive coverage – from inlet needles to flange gaskets – all calibrated for IAME standards, ensuring flawless fuel delivery that sharpens engine response. Racers leveraging this kit often see immediate gains in throttle linearity, making overtakes smoother and straights more potent, all while keeping your pit area meticulously organized.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFull array of orange spec diaphragms and seals\u003c\/li\u003e\n\u003cli\u003eNeedles, seats, and O-rings for exact metering\u003c\/li\u003e\n\u003cli\u003eStrainers and plugs to maintain cleanliness\u003c\/li\u003e\n\u003cli\u003eMultiple gasket sizes for flexible applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWhy choose this over generics? The spec orange materials offer superior resistance to fuels and heat, prolonging life in grueling races. SKU: RK6-HW. It's ideal for teams standardizing rebuilds, cutting variability and boosting collective speed across the roster.\u003c\/p\u003e\u003cp\u003eInstallation tales from the track highlight its user-friendliness; even solo tuners finish in record time, allowing more dyno runs to dial in peak power. This kit doesn't just fix – it elevates, supporting tweaks for altitude or blend changes that keep you adaptive.\u003c\/p\u003e\u003cp\u003eDeeper insights reveal how the uncaptured fulcrum arms enhance adjustability, fine-tuning idle to WOT for versatile track mastery. Invest here for a carb that not only runs faster but runs smarter, organizing your maintenance into a competitive advantage.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why should I choose the IAME Spec Orange kit over a standard generic rebuild kit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The IAME Spec Orange components are engineered with specialized materials that offer superior resistance to high-performance racing fuels and extreme engine heat. This ensures a longer service life and more consistent fuel metering compared to standard aftermarket alternatives.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I rebuild my carburetor using the RK6-HW kit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e For competitive racing, we recommend a full rebuild after every 3-5 race weekends or whenever you notice a decline in throttle linearity or engine response. Regular maintenance with this kit helps prevent lean conditions and keeps your engine running at peak performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include everything needed for a full internal overhaul?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the RK6-HW is a complete solution. It includes the full array of orange spec diaphragms, seals, inlet needles, seats, O-rings, strainers, and flange gaskets required to restore your carburetor to OEM-level accuracy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this kit help with tuning for different track altitudes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Absolutely. By ensuring your carburetor is sealed perfectly and the metering components are functioning at factory specifications, you create a reliable baseline. This makes it much easier to perform the necessary jetting or needle adjustments required when racing at different altitudes or in varying weather conditions.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-iame-spec-orange-dg3-hw\"\u003eIAME Spec Orange Tillotson Diaphragm and Gasket Kit for Precision Tuning\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-tfa\"\u003eTillotson HL\/HW Series Captured Fulcrum Arm - 155A-27 OEM Fuel Control Lever - All Classes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-spring-24b-299-tfas\"\u003eTillotson 24B-299 High-Pressure Fulcrum Arm Spring - 37 Gram Tension - OEM Carburetor Component\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/brass-screen-tbs\"\u003eHigh-Quality Brass Screen Filter for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/hl-flange-gasket-tfg\"\u003eHL Series Flange Gasket for 1.0\" Throttle Bore Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562685231422,"sku":"RK6-HW","price":48.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tillotson-complete-rebuild-kit-iame-spec-orange-rk6-hw.jpg?v=1763114310"},{"product_id":"tillotson-complete-rebuild-kit-p8-mrk","title":"Complete Tillotson Rebuild Kit for 3-Plate Double Stack EC Carburetors","description":"\u003cp\u003eRevive your Tillotson carburetor's glory with this comprehensive P8-MRK complete rebuild kit, tailored for 3-plate double stack EC configurations. As a reliable generic alternative to the RK-104HLR, it packs everything needed to bring your engine back to factory-fresh efficiency, minimizing power loss and maximizing speed on the circuit.\u003c\/p\u003e\u003cp\u003eWhat sets this kit apart? It's a full-spectrum solution that addresses wear in critical areas, from fuel delivery to metering, ensuring your kart responds sharply to every throttle input. Racers often find that a fresh rebuild like this restores lost horsepower, leading to quicker acceleration and better corner exits – crucial for gaining positions in tight packs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMain diaphragm for superior vacuum sealing\u003c\/li\u003e\n\u003cli\u003eFuel pump diaphragm and gasket to prevent leaks\u003c\/li\u003e\n\u003cli\u003eInlet valve components including uncaptured needle and fulcrum arm\u003c\/li\u003e\n\u003cli\u003eMultiple flange gaskets (1.00\", 1.060\", 1.125\") for versatile fits\u003c\/li\u003e\n\u003cli\u003eBrass fuel strainer screen and .375 Welch plug for clean operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eOrganizing your toolkit becomes effortless with these pre-assembled parts, each designed for quick installation without specialized tools. SKU: P8-MRK. Whether you're prepping for a series or maintaining a fleet, this kit helps keep downtime low and track time high, directly impacting your competitive edge.\u003c\/p\u003e\u003cp\u003eConsider the long-term benefits: high\/low side needle O-rings and inlet seat gaskets ensure precise fuel control, adapting to different racing fuels for consistent performance. Mechanics note how the mylar elements resist degradation, extending the life between rebuilds. In essence, it's an investment in reliability that pays dividends in podium finishes.\u003c\/p\u003e\u003cp\u003eStep-by-step, the rebuild process is straightforward – start with the diaphragms for airtight seals, then tackle the fuel system for optimal flow. This not only boosts engine efficiency but also aids in fine-tuning for specific track conditions, like high-altitude venues where air density varies.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this kit compatible with my specific carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This P8-MRK kit is designed specifically for 3-plate double stack EC carburetors. It includes multiple flange gaskets (1.00\", 1.060\", and 1.125\") to ensure compatibility across various double stack configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need special tools to install this rebuild kit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, this kit is designed for straightforward installation. The components are pre-assembled and organized to allow for a quick rebuild without the need for specialized shop tools.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I rebuild my Tillotson carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e While frequency depends on track time and fuel type, a rebuild is recommended whenever you notice a loss in throttle response, inconsistent fuel delivery, or leaks. Using this kit to replace diaphragms and O-rings regularly helps maintain peak horsepower and engine reliability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include the Welch plug?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this kit includes a .375 Welch plug, along with a brass fuel strainer screen, fuel pump diaphragm, and inlet valve components to ensure a complete internal refresh.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr\"\u003eOEM Tillotson Complete Rebuild Kit for Double Stack Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl\"\u003eTillotson DG-4HL Diaphragm \u0026amp; Gasket Kit - Double Stack Carbs - OEM Spec\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/needle-seat-kit-un-captured-233-669-tnsks\"\u003eTillotson 233-669 Un-Captured Needle Seat Kit - .093\" Orifice - Modified\/Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-tfa\"\u003eTillotson HL\/HW Series Captured Fulcrum Arm - 155A-27 OEM Fuel Control Lever - All Classes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/brass-screen-tbs\"\u003eHigh-Quality Brass Screen Filter for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562686148926,"sku":"P8-MRK","price":29.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tillotson-complete-rebuild-kit-p8-mrk.jpg?v=1763114326"},{"product_id":"tillotson-pumper-screw-single-stack-carb-only-tps","title":"Genuine Tillotson Pumper Screw for Single Stack Carbs","description":"\u003cu\u003eAccelerate your start routine:\u003c\/u\u003e Exclusively for single stack carbs, the TPS pumper screw (SKU: TPS, Tillotson OEM #15C-51) manually pumps fuel to banish hard starts, ensuring your kart roars to life without delays.\u003cul\u003e\n\u003cli\u003eGenuine OEM quality for perfect fit\u003c\/li\u003e\n\u003cli\u003eSimplifies fueling in cold or dry conditions\u003c\/li\u003e\n\u003cli\u003eReduces engine strain from prolonged cranking\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis screw keeps your pit area organized by streamlining startups, letting you focus on strategy rather than mechanical fiddling—vital for time-sensitive heats where seconds count toward pole position.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the primary purpose of the Tillotson pumper screw?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The pumper screw is designed to manually prime your single stack carburetor. By manually pumping fuel into the system before you crank the engine, you reduce the time spent turning the engine over, which saves your starter and battery while ensuring a quicker start.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this screw compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, this specific component (SKU: TPS) is engineered exclusively for single stack carburetors. It will not fit double stack or other specialized carburetor configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I use the pumper screw during my start routine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Simply turn the screw to manually actuate the pump diaphragm, allowing fuel to flow into the carburetor throat. Once you see or feel the fuel system prime, return the screw to its operating position before starting the engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is this part important for racing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e In competitive karting, every second counts. Using this screw to eliminate \"hard starts\" ensures you don't waste time in the pits or on the grid, allowing you to focus entirely on your race strategy rather than troubleshooting engine ignition issues.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-hl334wx-gas-carb-clone-o-h-v-no-longer-available-from-tillotson-hl334wx\"\u003eTillotson HL334WX Gas Carburetor for Clone OHV Engines in Kart Racing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/idle-speed-screw-tiss\"\u003eAdjustable Idle Speed Screw for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-low-speed-hl357a-43-388\"\u003ePrecision Adjustable Low-Speed Needle HL357A for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-washer-78a-256-tnw\"\u003eTillotson 78A-256 Brass Mixture Screw Washer - High\/Low Side - OEM Carburetor Part\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562688803134,"sku":"TPS","price":1.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tillotson-pumper-screw-single-stack-carb-only-tps.jpg?v=1763114382"},{"product_id":"tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl","title":"Tillotson DG-4HL Diaphragm \u0026 Gasket Kit - Double Stack Carbs - OEM Spec","description":"\u003cp\u003ePrecision fuel delivery is the backbone of any podium finish, which is why top-tier performance parts like the Tillotson DG-4HL Diaphragm and Gasket Kit are non-negotiable for serious racers. When you are pushing the absolute limits in motor kart racing, a compromised go kart carburetor means bogging out of the apex and losing critical tenths on the straightaway. The OEM Tillotson DG-4HL kit targets the heart of your double stack carb, delivering premium diaphragms and gaskets engineered specifically to eliminate vacuum leaks. Restoring smooth fuel pump action and metering precision is critical when you are tuning your engine to match the aggressive flow of your upgraded parts exhaust systems.\u003c\/p\u003e\u003ch2\u003eOptimizing Your Go Kart Carburetor for Peak RPM\u003c\/h2\u003e\u003cp\u003eRacers know that worn diaphragms dull throttle response and create erratic tuning conditions. This kit revives that immediate snap, helping you exit turns with absolute authority and maintain a blistering pace lap after lap. Whether you are bolting this onto a fresh engine build, servicing your primary race rig, or dropping it into a newly acquired go kart frame for sale that needs a complete fuel system overhaul, the DG-4HL ensures your double stack Tillotson operates at factory-fresh parameters.\u003c\/p\u003e\u003ch2\u003eMotor Kart Racing Reliability and Tuning\u003c\/h2\u003e\u003cp\u003ePracticality shines in the DG-4HL design. It simplifies your pit organization by bundling only what is strictly needed for diaphragm-focused rebuilds, saving valuable space in your trackside toolkit. For teams juggling intense race weekend schedules, this kit is a reliable way to maintain consistency across multiple engines, ensuring every kart performs at peak efficiency without unexpected lean-outs or flooding. A more efficient engine runs cooler, pulls stronger, and translates directly to fewer mechanical DNFs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Tillotson Specifications:\u003c\/strong\u003e Exact match for double stack carburetors, ensuring flawless integration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Diaphragm Set:\u003c\/strong\u003e Includes high-quality main, fuel pump, and inlet diaphragms for total fuel control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirtight Gasket Seals:\u003c\/strong\u003e Prevents vacuum leaks and fuel starvation under extreme lateral G-loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Metering Precision:\u003c\/strong\u003e Restores factory fuel flow for optimal, highly-tunable air\/fuel ratios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid Throttle Response:\u003c\/strong\u003e Eliminates bogging and hesitation out of tight corners for faster exit speeds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Material Construction:\u003c\/strong\u003e Built to withstand harsh racing fuels and high-vibration environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick Pit-Stop Installation:\u003c\/strong\u003e Bundled specifically for fast, diaphragm-focused trackside rebuilds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if my Tillotson carburetor needs this diaphragm kit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e If you are experiencing erratic tuning, a sluggish throttle response, or the engine is bogging out of corners, your diaphragms may be stiff or cracked. Replacing them with the DG-4HL kit restores the vacuum seal and fuel pump efficiency required for consistent performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this kit compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, this kit is specifically engineered for Tillotson double stack carburetors. Always verify your carburetor model number before installation to ensure proper fitment and fuel flow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the diaphragms and gaskets in my racing carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e For competitive racing, it is recommended to inspect your fuel system regularly. If you notice signs of fuel starvation or if the kart has been sitting for an extended period, a rebuild with fresh diaphragms is essential to prevent lean-out conditions that can damage your engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include everything needed for a full carburetor rebuild?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This kit is a diaphragm and gasket set focused on the fuel pump and metering side of the carburetor. It is designed for quick, trackside maintenance. If you require a more comprehensive overhaul including internal hard parts, consider a complete rebuild kit.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr\"\u003eOEM Tillotson Complete Rebuild Kit for Double Stack Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-p8-mrk\"\u003eComplete Tillotson Rebuild Kit for 3-Plate Double Stack EC Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/hl-flange-gasket-tfg\"\u003eHL Series Flange Gasket for 1.0\" Throttle Bore Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-spring-24b-299-tfas\"\u003eTillotson 24B-299 High-Pressure Fulcrum Arm Spring - 37 Gram Tension - OEM Carburetor Component\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tilt-fulcrum-arm-tfa\"\u003eTillotson HL\/HW Series Captured Fulcrum Arm - 155A-27 OEM Fuel Control Lever - All Classes\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562702827838,"sku":"DG-4HL","price":16.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tillotson-diaphragm-gasket-kit-oem-double-stack-dg-4hl.jpg?v=1763114528"},{"product_id":"tilt-pump-rebuild-kit-double-pumper-lp102","title":"Double Pumper Tilt Pump Rebuild Kit for Reliable Kart Fuel Systems","description":"\u003cp\u003eDon't let a faltering fuel pump sideline your kart – the LP102 double pumper Tilt pump rebuild kit is here to pump new life into your system. Centered on high-grade diaphragms, it targets the core of fuel delivery, ensuring consistent pressure that feeds your engine for unrelenting power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDiaphragm-focused rebuild for double pumper setups\u003c\/li\u003e\n\u003cli\u003eRestores priming and flow reliability\u003c\/li\u003e\n\u003cli\u003eCompatible with Tilt pump designs in karts\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis kit shines by eliminating weak spots in the pumping mechanism, leading to sharper starts and sustained mid-range grunt – perfect for weaving through traffic. It streamlines your rebuild process, organizing parts for fast assembly that gets you back to testing sooner. SKU: LP102. The direct benefit? A fuel system that matches your aggressive driving style without hiccups.\u003c\/p\u003e\u003cp\u003eDetail-oriented racers value how it prevents starvation issues, maintaining even distribution that enhances overall carb harmony. Simple yet effective, it's a cornerstone for keeping your Tillotson-inspired setup humming at peak efficiency.\u003c\/p\u003e","brand":"Tilt","offers":[{"title":"Default Title","offer_id":52562706563390,"sku":"LP102","price":7.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-tilt-pump-rebuild-kit-double-pumper-lp102.jpg?v=1763114604"},{"product_id":"adjuster-needle-spring-24b-449-tns","title":"Reliable Adjuster Needle Spring 24B-449 for Tillotson Carbs","description":"\u003ci\u003eA small part with big impact:\u003c\/i\u003e The 24B-449 spring keeps your adjuster needle responsive in Tillotson carburetors (SKU: TNS), countering track vibrations to hold settings firm during intense races.\u003cul\u003e\n\u003cli\u003eProvides consistent pressure for accurate metering\u003c\/li\u003e\n\u003cli\u003ePrevents needle flutter that causes erratic power\u003c\/li\u003e\n\u003cli\u003eLong-lasting steel construction for repeated use\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis spring helps your kart accelerate cleanly out of turns, organizing your setup for predictable handling and faster overall times. Swap it in during pit stops to restore like-new precision.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the primary function of the 24B-449 adjuster needle spring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This spring provides consistent tension on your carburetor's adjuster needle. By maintaining constant pressure, it prevents the needle from vibrating or \"fluttering\" due to track conditions, ensuring your fuel mixture settings remain locked in during a race.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: When should I replace my carburetor adjuster needle spring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e You should inspect or replace this spring if you notice your carburetor settings drifting during a race, if the adjuster needle feels loose, or if the spring shows signs of fatigue or deformation. It is a low-cost maintenance item that is vital for consistent engine performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this spring compatible with all Tillotson carburetors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The 24B-449 is designed specifically for Tillotson carburetors that utilize this specific spring specification. Always check your carburetor's parts diagram or manual to ensure the 24B-449 is the correct replacement for your specific model.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are there any tips for installing this spring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e When installing, ensure the needle threads are clean and free of debris. Be careful not to over-tighten the needle against the seat, as this can damage the needle tip or the seat itself. The spring should be seated properly to provide even resistance as you dial in your mixture.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-hi-speed-hl348e-43-966-til-43-966\"\u003eTillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-low-speed-hl357a-43-388\"\u003ePrecision Adjustable Low-Speed Needle HL357A for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-o-ring-44-361-44-270-tno\"\u003eDurable Adjuster Needle O-Ring for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-washer-78a-256-tnw\"\u003eTillotson 78A-256 Brass Mixture Screw Washer - High\/Low Side - OEM Carburetor Part\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/idle-speed-screw-tiss\"\u003eAdjustable Idle Speed Screw for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":52562713575742,"sku":"TNS","price":1.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotsoncarbs-adjuster-needle-spring-24b-449-tns.jpg?v=1763114695"},{"product_id":"tillotson-white-top-cap-oem-91a-251-ttc-w","title":"Tillotson White Top Cap OEM 91A-251 for Iame Vortex Engines \u0026 Tillotson Carbs","description":"\u003cp\u003eSecure your kart's fuel system with this essential \u003cstrong\u003eWhite Top Cap\u003c\/strong\u003e from Tillotson, OEM part number 91A-251. Designed as a spec cap for high-performance racing, it ensures a tight, leak-proof seal on your fuel tank or carburetor setup.\u003c\/p\u003e\u003cp\u003ePerfectly compatible with \u003cem\u003eIame\u003c\/em\u003e and \u003cem\u003eVortex\u003c\/em\u003e engines, this top cap fits seamlessly on any Tillotson single or double stack carburetor. Built to handle gasoline fuels, it's a must-have for maintaining optimal fuel delivery during intense track sessions. The durable white plastic construction resists cracking and wear, providing long-lasting reliability in demanding karting environments.\u003c\/p\u003e\u003cp\u003eWhether you're prepping for a club race or national event, this OEM replacement keeps your setup race-ready without compromises. Simple to install and engineered for precision fitment, it helps prevent fuel spills and contamination that can sideline your kart.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGenuine Tillotson quality you can trust\u003c\/li\u003e\n\u003cli\u003eUniversal compatibility across popular engine brands\u003c\/li\u003e\n\u003cli\u003eGasoline-safe for everyday racing use\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eUpgrade your fuel hardware today and focus on what matters—crossing the finish line first.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions (FAQs)\u003c\/h3\u003e\u003ch4\u003eIs this top cap compatible with Iame and Vortex engines?\u003c\/h4\u003e\u003cp\u003eYes, it's specifically designed as a spec cap for Iame and Vortex engines, ensuring a perfect match.\u003c\/p\u003e\u003ch4\u003eDoes it fit Tillotson carburetors?\u003c\/h4\u003e\u003cp\u003eAbsolutely—it works with any Tillotson single or double stack carburetor.\u003c\/p\u003e\u003ch4\u003eIs it safe for gasoline use?\u003c\/h4\u003e\u003cp\u003eYes, this white top cap is fully compatible with gasoline fuels.\u003c\/p\u003e\u003ch4\u003eWhat is the OEM part number?\u003c\/h4\u003e\u003cp\u003eThe official Tillotson OEM part number is 91A-251.\u003c\/p\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":53244497953086,"sku":"TTC-W","price":3.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/Top_Cap-White.jpg?v=1774904989"},{"product_id":"tillotson-fulcrum-arm-spring","title":"Tillotson Fulcrum Arm Spring","description":"\u003cp\u003eThis small steel spring applies tension to the \u003ca href=\"\/products\/tilt-fulcrum-arm-tfa\"\u003efulcrum arm\u003c\/a\u003e inside a Tillotson carburetor. It keeps the needle valve properly seated so your engine receives consistent fuel delivery instead of running lean or flooding.\u003c\/p\u003e\u003cp\u003eWhether you're a first-time kart builder learning how a carb works or a seasoned racer refreshing worn parts, the 24B-289 spring restores accurate throttle response and prevents the lean spots that kill lap times.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 24B-289\u003c\/li\u003e\n\u003cli\u003eAlternative To: \u003ca href=\"\/products\/tilt-fulcrum-arm-spring-24b-299-tfas\"\u003e24B-299\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaterial: Steel\u003c\/li\u003e\n\u003cli\u003eColor: Silver\u003c\/li\u003e\n\u003cli\u003eFits: Tillotson carburetors\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy replace it?\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRestores proper needle valve pressure\u003c\/li\u003e\n\u003cli\u003ePrevents inconsistent fuel delivery\u003c\/li\u003e\n\u003cli\u003eSimple drop-in fix for weak or stretched originals\u003c\/li\u003e\n\u003cli\u003eEssential for reliable carburetor tuning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"margin:28px 0;\"\u003e\n  \u003cp style=\"font-weight:700;margin:0 0 12px 0;font-size:1.02em;\"\u003e🏁 Product Highlights\u003c\/p\u003e\n  \u003cdiv style=\"display:grid;grid-template-columns:repeat(2,1fr);gap:8px;\"\u003e\n\u003cdiv style=\"padding:10px 14px;border:1px solid #d8e8f2;border-radius:6px;background:#f8fbfd;font-size:0.91em;line-height:1.45;\"\u003eThis small steel coil spring applies tension to the fulcrum arm inside a Tillotson carburetor.\u003c\/div\u003e\n\u003cdiv style=\"padding:10px 14px;border:1px solid #d8e8f2;border-radius:6px;background:#f8fbfd;font-size:0.91em;line-height:1.45;\"\u003eKeeps the needle valve seated to maintain consistent fuel delivery during operation.\u003c\/div\u003e\n\u003cdiv style=\"padding:10px 14px;border:1px solid #d8e8f2;border-radius:6px;background:#f8fbfd;font-size:0.91em;line-height:1.45;\"\u003eOEM part number 24B-289 serves as direct replacement for worn or stretched springs.\u003c\/div\u003e\n\u003cdiv style=\"padding:10px 14px;border:1px solid #d8e8f2;border-radius:6px;background:#f8fbfd;font-size:0.91em;line-height:1.45;\"\u003eAlternative to part number 24B-299 for Tillotson carburetor rebuilds.\u003c\/div\u003e\n\u003cdiv style=\"padding:10px 14px;border:1px solid #d8e8f2;border-radius:6px;background:#f8fbfd;font-size:0.91em;line-height:1.45;\"\u003eMade from steel with consistent coil windings for reliable spring rate.\u003c\/div\u003e\n\u003cdiv style=\"padding:10px 14px;border:1px solid #d8e8f2;border-radius:6px;background:#f8fbfd;font-size:0.91em;line-height:1.45;\"\u003ePrevents lean conditions and flooding that affect kart engine performance.\u003c\/div\u003e\n\u003cdiv style=\"padding:10px 14px;border:1px solid #d8e8f2;border-radius:6px;background:#f8fbfd;font-size:0.91em;line-height:1.45;\"\u003eSimple drop-in installation requires no special tools for most racers.\u003c\/div\u003e\n\u003cdiv style=\"padding:10px 14px;border:1px solid #d8e8f2;border-radius:6px;background:#f8fbfd;font-size:0.91em;line-height:1.45;\"\u003eSilver finish matches original equipment appearance inside the carburetor bowl.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Tillotson","offers":[{"title":"Default Title","offer_id":53415095796030,"sku":"TIL24B-289","price":1.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/tillotson-fulcrum-arm-spring-detail.jpg?v=1777625309"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/collections\/tillotsoncarbs-tillotson-hl334wx-gas-carb-clone-o-h-v-no-longer-available-from-tillotson-hl334wx.jpg?v=1788985384","url":"https:\/\/swiftkarting.com\/collections\/tillotson-hl-kart-carbs-rebuild-kits-parts.oembed","provider":"Swift Karting","version":"1.0","type":"link"}