GOOFIT Big Bore Cylinder Rebuild Kit for GY6 50cc 139QMB Racing Scooter Parts 64mm Valve
Special Features
- It can be Only Used for GY6 4stroke 49cc 50cc engine upgrade
- Easy installation with video instruction,you can visit the video on our facebook homepage and Youtube.
- Best way to get more RPM,maximum upgrade kit for GY6 50cc 139QMB engine and 1P39QMB Engine.
- Valve Length 64mm ,does not for 69mm one
- The Belt Cover/CVT Cover Gasket is for a Short Case Version
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