scootersparts

Universal Parts QMB139 50mm Big Bore Cylinder Kit

SKU QG.00678 151-258 Category Tag

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Description

Universal Parts 50mm Big Bore Cylinder Kit for 50cc 4-stroke QMB139 engines. Upgrades to 81.3cc based on a stock stroke of 41.4mm! Includes cylinder, piston, pin, circlips, rings, head gasket and base gasket.
*You may need to modify your engine case to accommodate the larger cylinder.

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