When performance, durability, and tunability matter most, Hilliard Extreme Duty clutches deliver race-proven power you can trust. Designed for everything from backyard go-karts to high-RPM racing and snowmobile competition, these clutches are engineered to handle extreme heat, aggressive throttle input, and continuous load without slipping or fading. Built with precision components and hardened wear surfaces, Hilliard clutches provide smooth engagement, rapid power transfer, and longer service life compared to standard centrifugal clutches.
What truly sets Hilliard apart is its quick-change spring and weight system, allowing riders and builders to dial in engagement RPM in minutes without removing the clutch. Whether you want smooth low-RPM takeoff for recreational karts or high-RPM launches for competitive racing, Hilliard’s tuning system lets you adapt instantly to track conditions, rider weight, and engine modifications. The result is better acceleration, improved belt life, and more consistent performance under heavy use.
Belt-Drive Clutches 3/4" Shaft
Designed to fit popular 3/4" crankshaft engines like Predator 212, Honda GX160/GX200, and Carroll Stream Rhino small gas engines, these clutches use a 3-11/16" pulley compatible with both 1/2" A-section and 5/8" B-section belts. The belt-drive design provides quiet operation, reduced drivetrain shock, and consistent power transfer.
Belt-Drive Clutches 1" Shaft
Hilliard 3/4" bore belt-drive centrifugal clutches are engineered for small-engine builds that need smooth engagement, long belt life, and reliable performance under load. Designed to fit popular 3/4" crankshaft engines such as Predator 212, Honda GX160/GX200, and Carroll Stream Rhino 6.5HP–9HP motors, these clutches feature a 3-11/16" pulley that works with both 1/2" A-section and 5/8" B-section V-belts.
Chain-Drive Clutches #35 Chain
The #35 chain is lighter and spins faster than larger chains, making it ideal for racing karts, sprint builds, and lightweight machines that prioritize RPM and top-end speed. Available in both 3/4" and 1" bore configurations with optimized sprocket tooth counts, these Extreme Duty clutches deliver crisp engagement, reduced drivetrain drag, and maximum throttle response.
Chain-Drive Clutches #40 / #41 Chain
These larger, stronger chains are ideal for off-road karts, drift trikes, utility vehicles, and heavier machines where shock loads, steep terrain, and aggressive riding demand a drivetrain that won’t slip or fail. Available in both 3/4" and 1" bore sizes with torque-optimized sprocket options, these Extreme Duty clutches deliver powerful launches, steady pulling force, and long service life even under extreme conditions.
