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Naraku QMB139 Adjustable Drive Sheave
- Overall Outer Diameter: 118mm
- Inner Diameter: 33.5mm
Naraku Adjustable Drive Sheave for 50cc QMB139 engines.
The more linear slots on this drive sheave allow for better acceleration. This part can also be called a torque driver or secondary slider.
Please see our Warranty & Returns Policy.