80cc Big Bore Kit Cylinder 69mm Head Piston Rings Chinese Scooter 50cc 60cc GY6
80cc Big Bore Kit with 69mm Valve Head Assembly
Need Faster acceleration, and more top speed to keep up with the flow. Then our Big Bore Kits are the way to go.
For scooters with 139QMB or 139QMI engines Scooter
Before ordering check your head assembly for the correct valve length. See the 2nd and 3rd listing images.
If you need a different BIG BORE KIT click link below
64mm Head 80cc Big Bore Kit w eBay Item# 291567626384
69mm Head 80cc Big Bore Kit w eBay Item# 271616884375
64mm Head 100cc Big Bore Kit w eBay Item# 281816759859
69mm Head 100cc Big Bore Kit w eBay Item# 271116277724
Specs
Intake Valve Diameter: 18mm
Exhaust Valve Diameter: 16mm
Head Assembly with 69mm Valves
80cc Cylinder Diameter: 47mm
Includes
Head Assembly with 69mm Valves
Cylinder
Piston
Ring Set
Wrist Pin
Cirq Clips
Head and Base Gaskets

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