Gear Ratio Calculator

We have created a tool to help you determine if you have the proper gear ratio in your kart. You can download it [here].

Extreme-Duty Centrifugal Clutches

The Extreme-Duty Sprocket Centrifugal Clutch is ideal for the everyday demands of childrens yard-use go-karts. This clutch was designed to be a low-cost upgrade to the stock unit. A thermodynamically designed clutch shoe increases the clutch’s capacity to absorb heat without damaging the clutch springs, resulting in longer life and better reliability.


  • Up to 13 HP
  • Bi-directional operation
  • Load-free starting
  • Optional engaging speeds
  • Excellent quality at a competitive price
  • Easy to install
  • Longer life than competitive clutches
  • Overload protection
  • Integral key design
  • Sintered metal clutch shoes
  • Heat dispersing spring-to-shoe design
  • Integral sheave (pulley version)

*Standard; optional engagement speeds available