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- Best Picks by Swift Karting: The Essential Pit Tools
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- Brake Bleeder Kit
- Brake Fittings & Ferrules
- Brake Fluid
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Brake Hubs
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Brake Parts (M.C.P.)
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Brake Rotors
- Caliper Brackets
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- Alfano Gauges & Accessories
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Mychron Gauges
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Axle Bearings
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Axles & Accessories
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Bully Clutches
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Chain
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Hilliard Clutches
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Horstman Clutch Parts
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Max-Torque Clutches
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Nor-Am Clutches
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Premier Clutches
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Viper Clutches
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196cc Clone Engine & Parts
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212cc Clone / Predator Engine & Parts
- 224cc Clone Engine & Parts
- Air Filters & Pre Filters (1.25")
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Air Filters & Pre Filters (2-7/16")
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Briggs LO206 Engines & Parts (LO206)
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Gaskets (Fel-Pro)
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Motor Mounts
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Oil & Additives
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Raptor (Flathead) Parts
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- Track Wear, Kart Life Apparel
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Optional Viper Clutch Floater Plate .090 Inch for Custom Builds
Regular price $13.89 USDRegular priceSale price $13.89 USD -
Performance Manufacturing Viper Big Pin Clutch Weight Lever - Flash Nickel Plated - Stock Class
Regular price $13.26 USDRegular priceSale price $13.26 USD -
Standard Viper Clutch Floater Plate .095 Inch Thickness
Regular price $12.90 USDRegular priceSale price $12.90 USD -
Viper Inner Thrust Bearing for Clutch Durability
Regular price $9.91 USDRegular priceSale price $9.91 USD -
Viper Big Block Steel Retaining Washer for Short Spacers
Regular price $9.91 USDRegular priceSale price $9.91 USD -
Standard Viper Clutch Weight Lever for Optimized Kart Shifting
Regular price $8.91 USDRegular priceSale price $8.91 USD -
0.010" Viper Clutch Drive Hub Shim for Custom Adjustments
Regular price $8.91 USDRegular priceSale price $8.91 USD -
Reliable Viper Big Block Inner Thrust Bearing 1.0" ID
Regular price $7.96 USDRegular priceSale price $7.96 USD -
Gold .085" Wire Viper Clutch Spring for Low-Stall Applications
Regular price $5.93 USDRegular priceSale price $5.93 USD -
Viper 3.5" Clutch Spring - Silver .090" Wire - All Applications
Regular price $5.93 USDRegular priceSale price $5.93 USD -
Viper Racing Blue Anodized Clutch Spring Retainer - FCDC-SRBLU - 4-Cycle Karting
Regular price $5.93 USDRegular priceSale price $5.93 USD -
Viper FCDC-SRRED Red Clutch Spring Retainer - High-Visibility - LO206 / 4-Cycle Racing
Regular price $5.93 USDRegular priceSale price $5.93 USD -
Spiral Design Viper Outer Snap Ring for 7/8" Shafts and Small Sprockets
Regular price $5.93 USDRegular priceSale price $5.93 USD -
Standard Viper Clutch Spring for Reliable Factory Performance
Regular price $5.93 USDRegular priceSale price $5.93 USD -
Viper Big Block Outer Thrust Washer for Clutch Stability
Regular price $4.93 USDRegular priceSale price $4.93 USD -
Durable Aluminum Viper Clutch Mounting Washer for 3/4" Bores
Regular price $4.93 USDRegular priceSale price $4.93 USD -
Essential Viper Clutch 7/8" Bearing Race Spacer - Soft Washer Design
Regular price $4.93 USDRegular priceSale price $4.93 USD -
Viper Single-Disc Clutch Jet Nut 10-32 - Reduced OD & Height - 4-Cycle Racing
Regular price $4.93 USDRegular priceSale price $4.93 USD -
10-32x1/2" TORX BHCS Viper Clutch Drive Plate Screw for 4-Disc Clutches
Regular price $3.93 USDRegular priceSale price $3.93 USD -
Viper Inner Thrust Washer for Clutch Stability
Regular price $3.93 USDRegular priceSale price $3.93 USD -
OEM-Style Viper Outer Clutch Washer .030" Thick Plain Finish
Regular price $3.93 USDRegular priceSale price $3.93 USD -
Black Oxide Viper Outer Clutch Washer .035" Thick for Large Sprockets
Regular price $3.93 USDRegular priceSale price $3.93 USD -
Thicker .050" Black Oxide Viper Outer Clutch Washer for Heavy-Duty Use
Regular price $3.93 USDRegular priceSale price $3.93 USD -
Heavy-Duty Big Pin Viper Clutch Lever Dowel for Enhanced Durability
Regular price $3.93 USDRegular priceSale price $3.93 USD -
Reliable Viper Clutch Lever Dowel Pin for Secure Assembly
Regular price $3.93 USDRegular priceSale price $3.93 USD -
Durable Viper Clutch Spring Retainer for Reliable Kart Performance
Regular price $3.93 USDRegular priceSale price $3.93 USD -
Viper VCB-BL Blue Clutch Mounting Bolt Kit - 5/16-24 x 3/4" - Go Kart Racing
Regular price $3.55 USDRegular priceSale price $3.55 USD -
High-Stall Pink .095" Wire Viper Clutch Spring for 4200+ RPM
Regular price $3.33 USDRegular priceSale price $3.33 USD -
Extended 10-32x5/8" TORX BHCS Viper Clutch Drive Plate Screw
Regular price $2.94 USDRegular priceSale price $2.94 USD -
Viper Big Block Retaining Bolt for Secure Clutch Assembly
Regular price $2.94 USDRegular priceSale price $2.94 USD -
Durable Viper Big Block Inner Thrust Washer 1.0" ID
Regular price $2.28 USDRegular priceSale price $2.28 USD -
Universal Viper Outer Snap Ring for 7/8" Snout Clutches
Regular price $1.23 USDRegular priceSale price $1.23 USD -
Secure Viper Clutch Weight Lever Nut for Kart Assemblies
Regular price $1.12 USDRegular priceSale price $1.12 USD -
Extended Viper Clutch Key for Four-Disk Drive Hubs
Regular price $0.89 USDRegular priceSale price $0.89 USD
Collection: Drive-line Components
Complete Driveline Systems for 4-Cycle Karting
In low-horsepower racing like LO206 and Clone, driveline efficiency is free horsepower. A binding chain, a worn sprocket, or a dragging clutch can cost you tenths of a second per lap. We stock high-performance clutches, chains, gears, and hubs designed to transfer every bit of power from your crankshaft to the rear tires.
Racing Clutches
Hilliard, Stinger, & Noram. We carry the best centrifugal clutches for 4-cycle engines, plus tuning springs and weights to dial in your engagement.
Chains & Breakers
#35 & #219 Pitch. High-tensile racing chains (Gold/Space) that resist stretching. Don't forget a Chain Breaker tool!
Gears & Sprockets
Split Sprockets & Drivers. Quick-change aluminum split gears allow you to change ratios in seconds without removing the axle.
The Big Debate: #35 vs. #219 Pitch
Most LO206 and 4-cycle racers must choose a chain size. Your clutch driver must match your rear sprocket.
- #35 Chain: The standard for US club racing. It is robust, affordable, and resists derailing on bumpy tracks. (Tooth counts are smaller, e.g., 15T Driver / 58T Rear).
- #219 Chain: Common in 2-cycle and some LO206 classes. It is lighter, runs smoother, and offers finer gear ratio adjustments. (Tooth counts are higher, e.g., 19T Driver / 74T Rear).
Chain alignment must be perfect. If your rear sprocket isn't perfectly inline with the clutch driver, you will throw chains and overheat your clutch. Use a straight edge or laser alignment tool every time you move the engine.
Gear Ratio Tuning
Changing your rear sprocket size is the easiest way to tune for a specific track.
Larger Rear Sprocket: Better acceleration (Corner exit), lower top speed.
Smaller Rear Sprocket: Higher top speed (Long straights), slower acceleration.
We recommend carrying a range of split sprockets (e.g., 58-64 for #35 chain) to adapt to track conditions.