Secondary gear drive Taller gears in the transmission reduce the overall reduction factor of the gearbox. If the engine is powerful enough to pull the taller gears, this modification will also raise top speed. Only use with tuning kits! Original cylinders are normally not powerful enough to pull this sort of gearing.

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Nom: POLINI GEARS SECONDAIRE YAMV/PGOBT/CPI 15-42 =2.80  Prix: 119.95  Sku: 202.1346  msrp: 0.00 
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