Universal Parts QMB139 50mm Big Bore Cylinder Kit

Description

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Item 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.
Upgrades to 81.3cc!
Bore: 50mm
Overall Height: 70mm
Cylinder Sleeve Outer Diameter: 54.4mm
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Not all replacement or upgrade parts come with instructions. It is the customer's responsibility to have common knowledge of installation or hire an experienced installer. We are not responsible for any damage that may be caused by any of the items we sell, whether installed by you or a professional. We are not required to provide step by step instructions or technical support. In any case, we will always do our best to help you with any technical question you may have.
Electrical parts are none returnable and buyer assumes all risks.
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