NCY Gear set QMB139

$74.99

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Unavailable

Unlock the full potential of your QMB139 50cc 4-stroke scooter engine with the NCY Performance Gear Set

This kit is made specifically for larger big bored engines and increases your gear ratio by 26%.  This will allow you to maximize your big bore kit by increased top speed and a more usable rev range. You won't see much if any improved performance if you install these on a stock top end.  For experienced tuners only.

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