Seller notes

Please Note: Does Require Pressing The Gears Off the ShaftFit to all Chinese GY6 50cc to 100cc 139QMA, 139QMB,147QMD Based Engine.2.88:1 Final Drive Gear Ratio (usually 3.41-3.71 stock)Get the most out of your big bore kit, with increased top speed and a more usable rev range performance with the right transmission gear setThere are variants within the imported Chinese engines so we would seriously recommend you remove the old gears and ensure count the number of teeth prior to purchase....

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