Oversize variator Polini Hi-Speed Evolution 2 for Polini P.R.E.Polini has developed the matching Hi-Speed Evolution 16 mm variator – 12.5° for the revolutionary P.R.E. (Polini Racing Engine) crankcase, designed for the Piaggio ZIP. This Hi-Speed variator has been further improved and adapted specifically for the P.R.E. setup, with a special 12.5° ramp angle for even better performance.The main difference to the standard Hi-Speed Evolution variator is the changed angle of the variator to improve acceleration on tuned engines. It is an oversize variator and should be used with the corresponding oversize components.Advantages of the Polini Hi-Speed CVTPolini applied its extensive experience and know-how to develop a variator that delivers a clear performance boost over the stock variator, providing stable power transfer and improved acceleration across the entire RPM range. Your scooter revs more aggressively and achieves a higher top speed.The EVO 2 uses DLC (Diamond Light Carbon) bushings — lightweight, low-friction, and extremely durable. Two high-quality seals ensure consistent lubrication. The cores of the variator rollers have polished sliding surfaces, and the sleeves feature a heat- and wear-resistant Nylon/Aramid coating. The included spring with anti-torsion spring seat has +8% tension, slightly stiffer than the stock spring.Advantages of oversize CVTOversize CVT systems extend the entire transmission range and can handle much more power than standard CVTs, which primarily pays off in the upper speed range. They are therefore primarily intended for powerful engines with a lot of power at high RPM. They result in smooth shifting behavior and prevent RPM fluctuations.While oversize variators can be used with a standard pulley, optimal performance is achieved only with an oversize pulley and a longer oversize drive belt.Details Polini Hi-Speed CVTComplete variator with bushing and ramp plate2 sets of CVT weights 19 x 15.5mm, 4.3g + 3.8g8% reinforced contra spring with Evo Slider spring seatShims and nutThe bushing has a 16mm diameter, so it must be used with a 16mm crankshaft stub.

• Brand: Polini
• SKU: U241.749
• Availability: In stock

Notes and Safety Polini Hi-SpeedThe famous Polini brand lists their "Hi-Speed" CVT as part of their catalog for many years. Of course, the CVT has been upgraded and improved over time, but the basic principle is still the same: a tuning variator for original and slightly tuned engines with a noticeable increase in performance compared to the original variator.Performance Polini High Speed CVTWith newly calculated and optimized angles, the Hi-Speed variator allows an extended power band. This shows above all in noticeably better acceleration, but also in a slightly higher top speed.Two integrated O-rings provide the sleeve with better lubrication, resulting in less friction.The low-friction,