Engrenage primaire POLINI - Z=14/10/17/20

POLINI PRIMARY CLOSELY-SPACED GEARBOX FOR VESPA SMALL FRAME 50/125CC With the aim to improve the use of tuned-up engines, Polini’s engineers have designed a new primary shaft with close-up gears. This feature lets the reduction of the RPM during the shift but maintaining the best rpm range while using it. The optimization of the teeth permits the interchangeability with the original secondary gears. It is produced using high quality steel and it is subject to heat-treatment using new generation furnace. 10-14-17-20 Quadruple Polini 10-14-18-22 original Vespa Item: 202.1417 Polini primary gear for Vespa 50/125 100% made in Italy