Variator Sliders Polini Maxi Hi-Speed Piaggio X9 500 / SYM Joymax 250 / 300

Polini Hi-Speed

The 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 CVT

With 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, robust chrome coating ensures reduced wear and increased service life.

For heavily tuned engines and engines with a significantly larger displacement, it is worth using an overrange CVT.

CVT sliders

CVT slide pieces / sliders are small plastic parts that sit on the edge of the ramp plate (the part behind the front pulley that is driven by the crankshaft) and ensure that it glides in the moving sheave of the CVT (the part with the roller weights).

The small plastic sliders are classic wear parts that need to be replaced from time to time, just like V-belts or CVT weights.

How to install  a CVT transmission ?