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New Secondary Gear Kit NCY 16/42 for GY6 139QMB/QMA View larger

Secondary Gear Kit NCY 16/42 for GY6 139QMB/QMA

1200-1269

New

NCY QMB139 upgear kit for your 50cc 4-strokes is finally here! This kit is made specifically for big bored engines and increases your gear ratio by 24%. 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

CAD$ 86.99

In stock

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