Re: centrifugal clutch question, is it true?
Centrifugal forces from the engine spinning drive the clutch friction material against the housing causing the clutch to engage. with engine not spinning when off, the clutch doesnt' contact the housing and is not engaged.
Depending on kit, some allow pedal starting but manual clutch has to be engaged to allow power to be transferred to the one way bearing on the centrifugal clutch. Some kits supposedly don't have this option and only allow pull start.