Gearbox kit 59 56 54 52 48 teeth BFA MOTORI 5-speed Square VESPA 50 125 SPECIAL PRIMAVERA ET3 PK S XL SS

Gearbox kit 59-56-54-52-48 teeth BFA MOTORI 5-speed Square for Vespa 50-125/?PV/?ET3/?PK50-125/?S/?SS/?XL/?XL2 for primary BFA incl . 5 gears, 8-arm control claw, multi-gear Z 22-20-18-15-11, drive shaft, kickstarter pinion If you want to take full advantage of the additional power provided by a tuned Vespa engine, you need a speed reducer. This wisdom is especially true with highly tuned engines that feature high power bands in the rpm range. The closer ratios ensure that the engine can stay in this power range as you accelerate through the gears. Due to the fact that all recently produced Vespa gearboxes contain only four gears, the tighter gear ratios quickly limit the maximum speed produced. More gears are the obvious solution, but a considerable challenge considering the compact size of the Vespa engine. A fresh and extremely innovative response was recently presented by BFA. A high-end gearbox solution for use in advanced racing projects based on the original engine casings. This five-speed transmission kit from BFA, intended for the Vespa Smallframe engine, is of high quality, has an intensive manufacturing process and an extremely innovative construction. With the use of a few engineering tricks, they managed to shoehorn the 5-gear construction with a tooth contact width identical to those found on the original four! First, they redesigned the internal kick starter mechanism. This new design requires a slight modification of the kick starter shaft. An advantage of this new setup is that the engine can be kicked while the clutch lever is pulled. Secondly, the crankshaft gears have bevelled sides and are now wound into place instead of being held by bezels. They redesigned the input shaft with individual gears and the selector spider with larger internal diameters. The number of selector spider arms has been doubled to eight. To make it possible to modify the kick starter mechanism, the BFA transmission kit is also necessary. There is a choice of three separately sized cogs for this transmission kit. Five-speed grouper / high-end tuner / BFA / smallframe / eight-arm selector Conclusion: a high-end product, facilitating engine tuning at the highest level. Each engine can be equipped with a much larger effective potential! The additional time and effort required to produce and possibly adapt this transmission is easily outweighed by the dynamic advantage it provides!