Clutch Dr. Pulley "Hit"DrPulley HiT Clutch Yamaha Zuma '89 '11 & 50F & C3 Dr. Pulley high performance clutch HiT 161310 Get quicker, harder launches & positive engagement with these HiT Clutches. Everything you could want out of a performance clutch, from fantastic machining and craftsmanship to great feel and response. Clutch Bell = 16 spline 107mm The Dr. Pulley clutch and bell set is designed to be tuned to your vehicle and comes with at least six sets of springs three