Fits 3 inch open BDL belt drives. The automatic design of this pressure plate system allows you to come to a complete stop while in first gear without pulling on the clutch lever. Simply give it the gas and the centrifical force of the pressure plate allows for a a smooth takeoff without touching the clutch lever. It decreases lever pull while shifting to a one-finger operation. As the engine speed increases, the centrifical force of the pressure plate drives the clutch plates together, thereby eliminating slippage, even when under extreme horsepower applications. This works well in conjunction with jockey shifters or twist type handlebar clutches with internal cable.