Secondary Gears Polini 14\/48 Piaggio NRG after 1998

A longer transmission will get the power where your need it and increase your top speed, always under the condition that your engine is powerful enough to begin with. This means you should definitely use this transmission with tuning cylinders only, as original cylinders are simply not powerful enough.Gear ratio: 14\/48 (3,43) => +7%
Shaft diameter = 17.7mm