Polini Maxi Hi-Speed Variator Kit for 125cc – 150cc GY6 Scooters, ATVs, and Go Karts INCLUDES: Variator Ramp Plate Slides Variator Boss Roller Weights (19×17, 9.7g) Clutch Torque Spring COMPATIBILITY: Genuine – Buddy 125/150/170i, Hooligan 170i Kymco – Agility 125/150, Like 125/200, Movie 125/150, People 125/150/200, Super 8 125, Vivio 125/150 Malaguti – Ciak 125/150/200 Many Chinese GY6 Scooters, ATVs, Go Karts The variator transmits the power of the engine to the rear wheel while keeping the engine in an exactly defined rev-band. The Polini Speed Control variator has optimised roller curves, excellent finish, reinforced on the outside and an oil seal to protect the bearing bush. The Polini Speed Control offers the advantage of a wider range of adjustment so if the correct weights are used, this will increase acceleration, as well as top speed. The kit is supplied with several different sets of weights for setting up the variator properly. **