The primary clutch is an advanced kind of centrifugal clutch and is usually mounted to your output stop from the motor crankshaft. The clutch has two sheave faces; one which is laterally mounted (stationary sheave), and one that can move out and in to interact the belt (moveable sheave). https://gearboxcvt87429.articlesblogger.com/55054238/gearbox-cvt-for-dummies