Jasil Top Racing 18/50 Gear Set for QMB139

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SKU: 160-5

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Current Stock: 2

Jasil Top Racing 18/50 Gear Set for 50cc QMB139 4-Stroke Engines. +17% Gear Ratio for increased top speed. It is recommended this gear set be used after installing a big bore cylinder kit. A stock engine will not have enough power to make use of a taller gear set.

Made in Portugal! No press required, just drop in and go!

Please see our Warranty & Returns Policy.

  • 18/50 Gear Set (2.78 to 1 ratio)
  • No pressing of gears required! Swap in place of your stock gears.
QMB139 50cc/49cc

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