I bet JBcruisin has the dirt on those. They are for the new whizzers. Some of that guys stuff mainly the motors had skme pretty crappy reviews. Tbat said tbats tbe guy to go for - to get a whizzer sheave.
neither.....I think its a pressure plate type clutch you'll be releasing and taking off with your left hand lever....slip clutches aren't really clutches...slipping belts is what they are