This Super Trans Kit is one of the best dollar-for-dollar bolt-ons to improve your scooter! It gives you quicker accelleration, higher top speeds, and makes your CVT the smoothest operating trans around! From rapid down shifting to slow cruising, this thing is smooth. Ultralight balanced components, oversized wear pads, and state of the art PTFE coatings ensure superior performance and long service life. Kit includes: aluminum drive face assembly pressure plate with slider bushings coated Golden pulley racing clutch secondary slider clutch bell 16 x 13mm 9G Roller Weights 1000 RPM compression spring NOTE: In order to install on a Buddy 50 or RoughHouse, you must reuse the OEM drive face. Brand: Fits: Buddy 50 Roughhouse GY50/QMB139 Chinese Scooters with 50cc engines