69mm Big Bore Cylinder Head Rebuild Kit For 139QMB GY6 50cc 60cc 100cc Scooter

Features 1 50cc 60cc 100cc Big Bore Kit with 69mm Valve Head Assembly 2 Installation instruction is not included Specification Intake Valve Diameter18mmExhaust Valve Diameter16mm100cc Cylinder Diameter50mmCylinder Head Diameter69mmFitment For Scooters 50cc 60cc 100cc GY6 139QMB GY6 139QMI Engines Package Included 1 XSet Cylinder Head Kit