for Vespa 50-125/PV/ET3/PK50-125/S/XL/XL2 Quattrini crankcase plastic for GPR and Bull gear box Grade AA – first-class repair and for tuned engines Product description Stefano BENELLI has been passionate about all possible petrol-driven vehicles, either two or four stroke, since the 1980’s. His love of the two-stroke is strong and especially for the Vespa. This is where he could gather his first experience in motor tuning and many of his developments have seen successful use in scooter sprint racing. He found that the original Vespa gearbox was unable to cope with the extra power. Back in the days when the only aftermarket gearbox component available here in Germany was a shorter 4th gear for the smallframe engine, the BENELLI range of gearbox parts were already being included in scooters racing in the Italian national racing series. In more recent times gearbox parts from a number of manufacturers have become available. Outside of his home country of Italy, parts pr