for HONDA 50 NSC 50R i.e./ Vision 50 i.e. (AF72E) 6 rollers 16×13 mm 6,3g Product description To achieve the best performance it is necessary to choose the best technology. This is why POLINI dedicates to the 4 stroke Honda owners a new HI-SPEED variator, a concentrate of sporting features. The new HI-SPEED variator kit includes rollers, compression spring. It is able to make grittier and reacting your scooter character. It improves the power output at every rpm, maintaining safety and reliability at the same time. The HI-SPEED for 4 stroke Honda has specific calibration for your original scooter. The compression spring, with increased load, improves the power output at every rpm. Even if the engine displacement of the scooter remains the same, it seems as you are driving a new scooter: grittier when starting and brilliant in the power output. For your wish of performance HI-Speed is really competitive, even as for its price. OEM numbers (for comparisons): 241.698 (POLINI)