4-stroke GY6 100cc 50mm Engine Cylinder Rebuild Kit 139QMB 139QMA (69mm Valve) with Cylinder Head Big Bore Go Kart ATV Moped

High-concerned chemical：None Displacement (ml)：GY6 100cc No. of Cylinders：4 Cylinder Item Weight：2kg External Testing Certification：ISO9000 Model Name：139QMA 139QMB Origin：Mainland China Item Type：engines Material：Aluminium Cylinder Head Valve Length：69mm Cylinder Diameter：50mm Piston Pin Diameter：13mm

High-concerned chemical: None Displacement (ml): GY6 100cc No. of Cylinders: 4 Cylinder Item Weight: 2kg External Testing Certification: ISO9000 Model Name: 139QMA 139QMB Item Type: engines Material: Aluminium Cylinder Head Valve Length: 69mm Cylinder Diameter: 50mm Piston Pin Diameter: 13mm