Upgrade your scooters CVT performance with the Polini Hi-Speed Variator D13 (Part #241.727), designed for Yamaha and Minarelli 50cc 2-stroke engines. This variator delivers improved acceleration, smoother power delivery, and optimized gear shifting. Ideal for riders looking to boost throttle response on scooters like the Yamaha Jog, Zuma, Aerox, and other horizontal Minarelli-powered models. Includes ramp plate and roller weights for easy installation.