Polini Performance Transmission Kit for Vespa ET2 and Piaggio 50cc 2 Stroke Scooters. This kit is designed to improve acceleration on stock, untuned scooters.
Includes Variator, Ramp Plate, Slides, Variator Boss, 19x15.5 Roller Weights in 6.3g, and 20Kg Torque Spring. Fits the following 2 stroke models: