The primary clutch is an advanced form of centrifugal clutch and is typically mounted to your output close of your engine crankshaft. The clutch has two sheave faces; one which is laterally set (stationary sheave), and one which can move in and out to engage the belt (moveable sheave). https://gearboxcvt74185.blogpayz.com/32400576/new-step-by-step-map-for-cvt