Upgrade your scooter's performance with the Polini Hi-Speed transmission system, designed specifically for the Zontes 125 D. The Hi-Speed is not simply a spare part but a technological upgrade that improves the engine's acceleration and response across the whole rev range. Thanks to the advanced design of the internal guides, the variator achieves an optimum distribution of the power, guaranteeing a more immediate "grab" from a standstill and a better top speed. Polini's build quality guarantees a long life and reliability under any riding conditions.