Polini Hi Speed Evolution 2 Oversize VariatorSince 2015, Polini has offered its Hi Speed variators in the Evolution version. With a 16 mm bushing, so it must be used with a crankshaft with 16 mm stump (smooth).The Polini Hi Speed Evolution 2 for Minarelli is an oversize model and should be used with a matching oversize rear pulley and oversize V-belt.The Hi Speed variators are ideal for highly tuned racing engines.Performance Polini Hi-Speed EVO 2The EVO 2 is the upgraded version of the already very powerful Hi Speed variator. Polini applied its extensive experience and technical know-how to achieve a noticeable power increase compared to the stock variator. It provides stable power transfer and improved acceleration throughout the entire RPM range. The engine revs more aggressively and achieves a higher top speed.The EVO 2 uses DLC (Diamond Light Carbon) bushings that are lightweight, low-friction, and extremely durable. Two high-quality seals ensure consistent lubrication. The cores of the variator rollers have polished sliding surfaces, while the sleeves are coated with heat- and wear-resistant Nylon/Aramid. The included spring with anti-torsion spring seat has +8% tension, making it 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.Scope of delivery Polini Hi-Speed VariatorComplete oversize variator with bushing and ramp plate2 sets of roller weights 19 x 15.5mm - 3.2g + 3.8gReinforced contra spring with Evo Slider spring seat1 tube of grease

• Brand: Polini
• SKU: U241.753
• Availability: Currently not 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,