Fits Engine 2 - 6.5HP with 3/4" Shaft and 3/16" Key way Fits : 2 - 6.5HP engines HONDA GC160, GC190, GX120, GX140, GX160, GX200 Fits : Briggs & Stratton and 2 - 6.5 HP With 3/4" Shaft Fits : Tecumseh Engines 2 - 6.5 HP With 3/4" Shaft Mounts onto crankshaft using bolt and washer on the end of the crankshaft. Set Screws NOT Included Note: Centrifugal clutches are designed to be used with tires no larger than 15" tall. With a live axle kart you need to run at least a 60T sprocket and then it is only good on flat surfaces. For off road and hill climbing you need a Torque converter set up.