High Quality Mini Bike Centrifugal Clutch 5/8″ Bore For #35 Chain For 2.8HP, 97cc Engines. Engagement Speed: 2000??100 RPM,Horse Power: Up to 8 HP,Keyway: 3/16 inch,Outside Diameter: 4.22 inch. The clutch is reversible. Fits for mini bike,generator,garden tractors,go kart, single wheel drive karts with tires no larger than 15″ Tall. For any reason you’re not completely satisfied, please feel free to contact us for a replacement or full refund. Please make sure the Horse Power(HP) of your motor is within the maximum HP of our clutch because running at a high HP can overheat and damage the clutch. Set Screws Not Included Package included:1 x 5/8″ Bore Centrifugal Clutch Go Kart Torque Converter 3/4″ Compatible with Predator 212 Go Cart Centrifugal Clutch 3/4″ 10T with #40/41/420 Chain Go Cart Centrifugal Clutch 5/8″ Bore 1