Hilliard clutches are very sensitive to gearing. You must use at least a 6 to 1 gear ratio with tires at 14" or less in height.
No warranty is available for Hilliard clutches because of this!
Hilliard's Extreme Duty - 3/4" 10 Tooth 40/41/420 Chain
Hilliard's patent-pending Extreme Duty centrifugal clutch can handle higher temperatures to offer longer clutch life.

Stock engagement at 2300 RPM's
Bi-Directional, can run clockwise & counter clockwise.
Dissipates heat better, extending clutch life.
Clutch is easily tuned for your specific need.
Quick change spring and sprocket design.
No special tools needed.
Built-in internal keyway.

Must use
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Hilliard Extreme Duty Clutch #40/41/420 10 Tooth 3/4" Bore

Hilliard clutches are very sensitive to gearing. You must use at least a 6 to 1 gear ratio with tires at 14" or less in height.

No warranty is available for Hilliard clutches because of this!

Hilliard's Extreme Duty - 3/4" 10 Tooth 40/41/420 Chain

Hilliard's patent-pending Extreme Duty centrifugal clutch can handle higher temperatures to offer longer clutch life.

  • Stock engagement at 2300 RPM's
  • Bi-Directional, can run clockwise & counter clockwise.
  • Dissipates heat better, extending clutch life.
  • Clutch is easily tuned for your specific need.
  • Quick change spring and sprocket design.
  • No special tools needed.
  • Built-in internal keyway.

Must use crankshaft bolt.



We do not accept returns on any electrical components.