Excellent acceleration and overwhelming engine power on offer from the Polini Hi-Speed variator ​​for SYM Joymax 125i. The biggest new feature is the variator sleeve, which is chromed nickel for a minimal friction coefficient. Also features the innovative DLC Carbon treatment for friction and wear components in racing and aviation. The surfaces of the Variator rollers have a new polishing treatment to increase lubricity. The included counter-pressure spring is 15% stronger than the original, which increases the engine speed during launch. 100% Made in Italy.