Universal Parts QMB139 39mm Cylinder Kit $38.99 Quantity discounts available QuantityPrice SKU: 151-257 This item is IN STOCKCurrent Stock: 7 Quantity -+ Add to Cart Details Specs Bore: 39mmOverall Height: 70mmCylinder Sleeve Outer Diameter: 44.7mm Supported Models QMB139 50cc/49cc , Various unlisted makes/models DetailsSpecsSupported Models Back Universal Parts 39mm Stock Cylinder Kit for 50cc 4-stroke QMB139 engines. Includes cylinder, piston, pin, circlips, rings, head gasket and base gasket. Back Bore: 39mmOverall Height: 70mmCylinder Sleeve Outer Diameter: 44.7mm Back QMB139 50cc/49cc , Various unlisted makes/models