Jasil 4-piece secondary gear up kit for scooters using a Minarelli 50cc 2-stroke engine. Both horizontal and vertical.This pre-press kit makes it easy to fit as no heavy duty press is required. As with any gear up this will increase your final gearing making the top speed greater and stop over revving.Gear ratio of 15/39-52 or 14/41-52 (will match up with the standard 13tooth primary gear shaft). This will increase this final gearing between 5% to 30% depending on what your standard gearing is.*Made in Portugal.Jasil 6014396, 6014395
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