The key clutch is a sophisticated form of centrifugal clutch and is often mounted for the output end with the engine crankshaft. The clutch has two sheave faces; one which is laterally fixed (stationary sheave), and one which can transfer in and out to interact the belt (moveable sheave). https://marcorrqol.vidublog.com/31486194/detailed-notes-on-gearbox-cvt