The primary clutch is a complicated sort of centrifugal clutch and is typically mounted to the output close on the engine crankshaft. The clutch has two sheave faces; one which is laterally set (stationary sheave), and one which can go in and out to interact the belt (moveable sheave). https://cvt75318.blogars.com/31372185/getting-my-gearbox-cvt-to-work