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#P7840
Polini secondary gear kit for Yamaha Aerox/ Minarelli horizontal engine 50cc 2-stroke scooters.
A gear kit is required when fitting a 70cc cylinder kit. The extra power provided by 70cc cylinders is sufficient to be able to pull a taller gear, allowing the scooter to achieve higher top speeds and cruise at a more efficient engine speed.
Ratio: 15/42t
Polini 202.1346
The thick shim goes in the cup to form a guide to set the Polini gear in the correct position on the wheel axle/shaft.
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