The key clutch is an advanced form of centrifugal clutch and is typically mounted into the output conclusion on the engine crankshaft. The clutch has two sheave faces; one which is laterally fixed (stationary sheave), and one that can shift in and out to interact the belt (moveable sheave). https://collinyazaz.answerblogs.com/32532825/the-gearbox-cvt-diaries