The first clutch is an advanced kind of centrifugal clutch and is often mounted into the output finish in the motor crankshaft. The clutch has two sheave faces; one which is laterally fixed (stationary sheave), and one which can transfer in and out to engage the belt (moveable sheave). https://gearbox-cvt65318.theblogfairy.com/31630149/getting-my-gearbox-cvt-to-work