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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
- Enginetics Parts
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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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- Clutch Mounting Bolt Kits
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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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Sprocket Hubs
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Sprockets
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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")
- Big Block Clone Accessories
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Briggs LO206 Engines & Parts (LO206)
- Briggs Quarter Midget Engine and Parts
- Briggs World Formula
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Fuel Tanks
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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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- Wiseco Pistons
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- Track Wear, Kart Life Apparel
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3/4" Viper 6-Spring Clutch without Driver (4-Disc) - Choose Your Drum Pattern
Regular price From $388.53 USDRegular priceSale price From $388.53 USD -
Viper 3/4" 6-Spring 3-Disc Clutch - Steel Drum, No Driver
Regular price $384.68 USDRegular priceSale price $384.68 USD -
Viper Unassembled Big Pin 6-Spring Three-Disk Clutch without Driver - Silver Finish, Choose Your Drum Type
Regular price From $381.83 USDRegular priceSale price From $381.83 USD -
3/4" Viper Boxstock 2-Disc Clutch - Vented Blue High-Performance
Regular price $377.93 USDRegular priceSale price $377.93 USD -
Viper FCDC-KIT#45 Unassembled 4-Disk Clutch Kit - 3/4" Bore - High Torque Racing
Regular price $374.37 USDRegular priceSale price $374.37 USD -
Turbo Pattern Drum Viper Unassembled Four-Disk Clutch 3/4" Bore
Regular price $374.37 USDRegular priceSale price $374.37 USD -
Viper Big Block Unassembled 4-Disk Clutch Kit - 1.0" Bore - Outlaw / Modified
Regular price $374.37 USDRegular priceSale price $374.37 USD -
3/4" Viper 6-Spring Clutch without Driver - 3-Disc Aluminum Drum (Choose Color: Black, Blue, Red)
Regular price $368.43 USDRegular priceSale price $368.43 USD -
3/4" Viper 6-Spring 3-Disc Clutch - Aluminum Drum, No Driver
Regular price $364.43 USDRegular priceSale price $364.43 USD -
Viper Blue Two-Disk Big Pin Clutch Kit - Unassembled
Regular price $350.93 USDRegular priceSale price $350.93 USD -
Silver Big Pin 6-Spring Viper Unassembled Two-Disk Clutch Kit
Regular price $347.73 USDRegular priceSale price $347.73 USD -
Viper 3/4" Big Pin 6-Spring Two-Disk Clutch - Silver Drum & Levers, No Driver
Regular price $344.18 USDRegular priceSale price $344.18 USD -
3/4" Viper Boxstock 1-Disc Clutch - 6-Spring Big Pin Design
Regular price $330.68 USDRegular priceSale price $330.68 USD -
Viper Unassembled Three-Disk Clutch Kit - Choose Your Drum for Optimal Performance
Regular price From $328.23 USDRegular priceSale price From $328.23 USD -
3/4" Viper 6-Spring 2-Disc Clutch with Steel Vented Drum - No Driver
Regular price $319.88 USDRegular priceSale price $319.88 USD -
Viper 3/4" 6-Spring 2-Disc Vented Blue Clutch - Driverless for 4-Cycle Kart Engines
Regular price $317.18 USDRegular priceSale price $317.18 USD -
Viper 3/4" 6-Spring 2-Disc Vented Black Clutch - No Driver for 4-Cycle Kart Engines
Regular price $317.18 USDRegular priceSale price $317.18 USD -
Viper 3/4" 2-Disc 6-Spring Clutch Blue Anodized - No Driver
Regular price $310.43 USDRegular priceSale price $310.43 USD -
Viper 3/4" Black 6-Spring 2-Disc Clutch - Driverless for 4-Cycle Kart Engines
Regular price $310.43 USDRegular priceSale price $310.43 USD -
Viper FCDC-2D Unassembled Two-Disk Clutch Kit #4 - Blue Vented Drum - 4-Cycle Racing
Regular price $303.33 USDRegular priceSale price $303.33 USD -
3/4" Viper 6-Spring Clutch without Driver (1-Disc) - Customizable Colors for Kart Racing Performance
Regular price $300.96 USDRegular priceSale price $300.96 USD -
3/4" Viper 6-Spring 2-Disc Clutch - No Driver for 4-Cycle Karts
Regular price $296.93 USDRegular priceSale price $296.93 USD -
Viper FCDC-KIT#4 Unassembled 2-Disk Clutch - Solid Blue Drum - 3/4" Bore
Regular price $295.93 USDRegular priceSale price $295.93 USD -
Vented Silver Viper Unassembled Two-Disk Clutch for High-Heat Racing
Regular price $288.53 USDRegular priceSale price $288.53 USD -
Silver Viper Unassembled Two-Disk Clutch Kit for Custom Kart Builds
Regular price $281.13 USDRegular priceSale price $281.13 USD -
3/4" Viper 6-Spring 1-Disc Clutch - No Driver Required - 4-Cycle Kart Ready
Regular price $276.68 USDRegular priceSale price $276.68 USD -
Viper #2 Black 2-Disk Unassembled Clutch Kit - Ready-to-Assemble Kart Drivetrain
Regular price $269.93 USDRegular priceSale price $269.93 USD -
Viper Unassembled Two-Disk Clutch #1 Silver with Custom Colored Drum - Choose Your Color
Regular price $261.23 USDRegular priceSale price $261.23 USD -
Viper Unassembled One Disk Clutch #015 - High-Performance Kart Racing Essential
Regular price From $241.13 USDRegular priceSale price From $241.13 USD -
Viper Big Block 4-Disc Drive Hub - 1.0" Bore - Open/Modified
Regular price $106.52 USDRegular priceSale price $106.52 USD -
SMC 10T #35 Sprocket Conversion Kit for Viper Bully Three Disk Clutches
Regular price $89.03 USDRegular priceSale price $89.03 USD -
SMC 9T #35 Sprocket Conversion Kit - Outboard Mount for Bully & Viper Clutches
Regular price $82.94 USDRegular priceSale price $82.94 USD -
Viper Steel 4-Disc Clutch Drum with Turbo Pattern for Big Block Karts
Regular price $68.69 USDRegular priceSale price $68.69 USD -
Viper Big Pin Clutch Lever Support - Silver Aluminum - Modified & Stock Classes
Regular price $68.67 USDRegular priceSale price $68.67 USD -
Heavy-Duty Viper Steel 4-Disc Clutch Drum for Maximum Durability
Regular price $67.44 USDRegular priceSale price $67.44 USD -
Viper Blue Anodized Big Pin Clutch Lever Support for Kart Racing
Regular price $66.08 USDRegular priceSale price $66.08 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.