The principal clutch is a sophisticated type of centrifugal clutch and is typically mounted to the output close with the motor crankshaft. The clutch has two sheave faces; one that is laterally fixed (stationary sheave), and one which can go in and out to engage the belt (moveable sheave). https://josueklkge.targetblogs.com/32861288/the-gearbox-cvt-diaries