The Polini Variator Kit EVO was especially developed for use in the 300cc Vespa GTS/GTV models. Consequently, the pulley weights, ramp angles etc. are exactly matched to the weight and wheelbase of these particular models and not just the QUASAR motoras is the industry norm. High precision manufacture of the variator roller ramps combined with an exactly calculated ramp angle ensures an optional acceleration and top speed. The flank angle of the pulley cover disc included in the kit, is noticeably different to that on the original item and provides a better acceleration and a more performance orientated drive train with increased efficiency. The altered design of the cooling fan makes sure of more cooling for the whole transmission. The drive belt is shorter and more precisely produced than the original meaning that the Variator unit can open further without the belt coming into contact with the crankcase causing damage to the oil sumps gasket. This kit comprises of a Variator, Drive belt, pulley disc, 10% stiffer contrast spring and a set of roller weights.