  Hoca 50cc QMB139, Performance Cylinder Kit
Hoca 50cc QMB139 4-stroke 50mm, Racing Big Bore Cylinder Set. Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket.
Please see our Warranty & Returns Policy.
We recommend that you use our QMB139 performance cylinder head (see Related Items) with this set as some stock cylinder heads will not fit.
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