This is the MotoTec Universal Parts 50cc QMB139 4-Stroke Cylinder & Head Kit, 64mm Valves.
Choose from 39mm, 47mm or 50mm bore in the dropdown.
Note: You may need to modify your engine case to accommodate the larger cylinder.
Upgrades:
What Your Kit Comes With:
Product Specifications:
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-All products therefore has the full manufacturer's warranty or the distributor's warranty.
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