47.7mm Bore 50cc 60cc 80cc GY6 QMB139 Cylinder Head Piston Rings Set For Scooter<br /><br />? Specification<br />Color:like the picture<br />Weight:1873g<br />Bore Size:47.7mm<br /><br />? Feature<br />1.High quality.<br />2.Durable and effective top powe