Polini Variator Kit for 125cc – 150cc Vespa Scooters (with 3-Valve Cylinder Head)COMPATIBILITY: Piaggio – Fly 125 (2012+), Liberty 150 (2013-14)Vespa – 946, LX 125 (2012-13), GTS 150, LT/LX 150 (2012+), Primavera 150, Sprint 150NOTE: Please note the shim must be fitted between the pin and the fixed pulleyPolini Performance Transmission Kit for Vespa 125cc and 150cc 3 Valve 4-Stroke Scooters. This kit is designed to improve acceleration on stock, untuned scooters.Includes Variator, Ramp Plate, Slides, Variator Boss, 19×17 Roller Weights in 9g and 13.5g, and 35Kg Torque Spring. Fits the following 4 stroke models with 3 valve heads **