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Collection: Drive-line Components
811 Drive-line Components - Scroll Down
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.
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FCDC Two-Disk Arena Bully Drive Hub Kit for BA Sprockets
Regular price $115.01 USDRegular priceSale price $115.01 USD -
Buller Built Bully OEM Clutch Shim - 3/4" Shaft - LO206/Clone Legal
Regular price $2.24 USDRegular priceSale price $2.24 USD -
Buller Built Bully Turbo Jackshaft Drive Hub - 3/4" Bore 4-Disk - Modified Class
Regular price $79.63 USDRegular priceSale price $79.63 USD -
Viper Blue Anodized Big Pin Clutch Lever Support for Kart Racing
Regular price $66.08 USDRegular priceSale price $66.08 USD -
High-Performance Aftermarket #35 Clutch Driver for SMC, Buller, and Premier Karts - Specify Tooth Count
Regular price $24.70 USDRegular priceSale price $24.70 USD -
Hilliard Inferno FURY OEM Bully Conversion Clutch with Drum Kit
Regular price $99.55 USDRegular priceSale price $99.55 USD -
Bully 3-Disk 6-Spring Junior Sprint Clutch with 17T #219 Sprocket
Regular price $498.91 USDRegular priceSale price $498.91 USDSold out -
Bully Clutch Turbo Pattern 3/4" Outboard Jackshaft Driver - 14T to 21T Select Size for Optimal Kart Performance
Regular price $39.52 USDRegular priceSale price $39.52 USD -
Bully Turbo Jackshaft 4-Disk Clutch - 3/4" Bore - Open/Modified Class
Regular price $444.00 USDRegular priceSale price $444.00 USD -
Buller Built Bully 0.085" Floater Plate - OEM 098-085 - 4-Cycle Kart Racing
Regular price $29.83 USDRegular priceSale price $29.83 USD -
Buller Built Bully 2-Disc 0.075" Floater Plate - Hardened Steel - All Racing Classes
Regular price $29.83 USDRegular priceSale price $29.83 USD -
Modified Bully Clutch Lever - Ball Style for Kart Racing
Regular price $17.42 USDRegular priceSale price $17.42 USD -
Bully 2-Hole Clutch Lever - OEM #098-115 Go-Kart Replacement
Regular price $11.41 USDRegular priceSale price $11.41 USDSold out -
Bully TURBO Steel Clutch Basket (4 Disc)
Regular price $79.31 USDRegular priceSale price $79.31 USDSold out -
Bully 4-Spring Clutch Pressure Plate - OEM #098-255
Regular price $61.17 USDRegular priceSale price $61.17 USD -
Bully 3-Disc Clutch Drive Hub for Six Spring Clutches - OEM 098-345-6
Regular price $80.87 USDRegular priceSale price $80.87 USD -
Bully 6-Spring Clutch Activator Plate - OEM #098-250
Regular price $63.25 USDRegular priceSale price $63.25 USDSold out -
Bully 4-Spring Clutch Activator Plate for Kart Racing
Regular price $63.25 USDRegular priceSale price $63.25 USD -
Bully 3-Disc 6-Spring Kart Clutch with Red Adult Springs - No Sprocket
Regular price $477.24 USDRegular priceSale price $477.24 USDSold out -
Bully 2-Disc 6-Spring Clutch for JR1 Rookie Clone Predator Engines - Black Springs, No Sprocket
Regular price $404.93 USDRegular priceSale price $404.93 USD -
Bully Ball Lever Clutch 2-Disc 4-Spring Adult Animal No Sprocket
Regular price $426.53 USDRegular priceSale price $426.53 USDSold out -
Bully Ball Lever Clutch 2-Disc 6-Spring Red Springs Adult JR2 (No Sprocket)
Regular price $438.68 USDRegular priceSale price $438.68 USDSold out -
Buller Bully 2-Disc 6-Spring Clutch Red Springs Adult JR2 No Sprocket
Regular price $404.93 USDRegular priceSale price $404.93 USD -
Buller Bully 2-Disc 4-Spring Clutch for Adult Stock 4000RPM Karts (No Sprocket)
Regular price $404.93 USDRegular priceSale price $404.93 USDSold out -
Bully 3/4" Turbo Ring Gear Hub for Tuffy Drums
Regular price $39.79 USDRegular priceSale price $39.79 USD -
Genuine Bully 11-Tooth Clutch Driver Sprocket
Regular price $39.79 USDRegular priceSale price $39.79 USDSold out -
0.065" Bully Floater Plate for Compatible Clutch Systems
Regular price $29.83 USDRegular priceSale price $29.83 USD -
Bully Thick .030 Inner Thrust Washer Silver Polished Finish
Regular price $6.92 USDRegular priceSale price $6.92 USD -
Bully Clutches 3/4" Outer Thrust Washer - BCOTW Thrust Load Management - All Classes
Regular price $1.84 USDRegular priceSale price $1.84 USD -
Stainless Steel Bully Clutch Plate Bolt for Secure Assembly
Regular price $0.41 USDRegular priceSale price $0.41 USD -
Updated Bully Clutch Inner Thrust Bearing for Enhanced Reliability
Regular price $5.44 USDRegular priceSale price $5.44 USD -
Bully OEM Slotted 8-Tab Friction Disc for Clutches
Regular price $42.00 USDRegular priceSale price $42.00 USD -
Bully Clutches BCOTW11 Outer Thrust Washer - 11-Tooth Sprocket - 4-Cycle Racing
Regular price $3.93 USDRegular priceSale price $3.93 USD -
Purple .067" Bully Clutch Spring for Custom Engagement Rates
Regular price $7.92 USDRegular priceSale price $7.92 USD -
Bully 4-Spring Clutch Lever Dowel Pin
Regular price $2.94 USDRegular priceSale price $2.94 USD -
Bully Clutches 3/4" Coated Steel Lever Weight - BCBW Replacement - 4-Cycle Racing
Regular price $7.96 USDRegular priceSale price $7.96 USD