The first clutch is a complicated sort of centrifugal clutch and is often mounted on the output close of the engine crankshaft. The clutch has two sheave faces; one that is laterally fastened (stationary sheave), and one which can shift in and out to engage the belt (moveable sheave). https://johnathanazxuq.glifeblog.com/31453634/the-smart-trick-of-gearbox-cvt-that-no-one-is-discussing