50mm Big Bore Cylinder Piston Kit Fits For GY6 50cc Scooter Moped 139QMB 1P39QMB 50mm Big Bore Cylinder Kit W/ Assembled Head For 50cc Scooters 139QMB & 1P39QMB Big Bore Cylinder Piston

Product function description:

NOTE:

Installation Manual Is NOT Included

Professional Installation Is Highly Recommended

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