This gearbox reduction gear will fit 50cc scooter engines with the following codes: 139QMA, 139QMB
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The reduction gear in a motorcycle reduces the rotational speed of the starter motor output, increasing torque to drive the crankshaft, which helps optimize performance and manage power delivery.
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This gearbox reduction gear will fit 50cc scooter engines with the following codes: 139QMA, 139QMB
