The first clutch is an advanced method of centrifugal clutch and is usually mounted towards the output end with the motor crankshaft. The clutch has two sheave faces; one which is laterally mounted (stationary sheave), and one that can transfer out and in to engage the belt (moveable sheave). https://gearbox-cvt20752.spintheblog.com/32716020/the-5-second-trick-for-gearbox-cvt