50mm Big Bore Cylinder Piston Kit GY6 50cc / 100cc Scooter Moped 1P39QMB 139QMB

Features:
?? 100% brand new and high quality,Durable.
?? It could correctly replace the original quality part.
?? This Performance Racing Parts kit can make full use of your 48cc, 50cc scooters .
Specification:
Material: Metal
Head: 64mm valves
Cylinder Size : 50mm ID
Diamater:
Intake Valve Diameter: 18mm
Exhaust Valve Diameter: 16mm
Performance Racing CDI (AC Fired):70mmx30mmx37mm
Performance Racing Coil length:360mm
Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm)
Please Compare The Scooter Kit With Your Original One Before Purchasing??
Fits (For the reference):
For 139QMB & 1P39QMB /GY6 50cc 4 Stroke Chinese Scooters
Package includes:
?? 50mm Big Bore Cylinder Kit With Assembled Head,
?? Performance Racing CDI (AC Fired),
?? Performance Racing Coil
?? Rollers
?? Rocker Arms
?? Oil Pump & Drive Gear
?? Intake & Exhaust Studs & Complete Gasket Set