Cylinder Big Bore 50cc Upgrade to 70cc (64mm valve length) kit

Regular price $169.95 Sale price $64.95



Boost your GY6 50cc scooter to a 70cc with this bolt on kit. Everything you need and

Upgrade Kit 47mm cylinder, up to *70cc  

 Kit Includes:
- Assembled Cylinder Head *For stock 64mm valve lengths
- 47mm Piston Set With Rings & Wrist Pin.
- Rocker Arms assembly,
-A9 Cam
Exhaust Studs included with Factory Style Nuts, Head gasket set and a Spark Plug.
-Free EGR Blocking Plates.

*This kit will fit 50cc motors with a stock 64mm Valve length. If you had the stock 70mm Valve length, this kit would boost you to 80cc.
Made in Taiwan
Legal Disclaimer: This product is intended for off-road, non-street, or to be used on racing vehicles on closed courses only. Use of non-approved products may void warranty. Improper installation or use of some products can cause serious bodily harm, injury and/ or death. Check with local laws before ordering. Some products may accelerate wear. Use these products at your own risk.
PERFORMANCE PARTS affect how your engine and all its parts run. Performance parts should always be installed by a certified technician.
*STATE OF CALIFORNIA: Our products are "Race Only" products and are not designed, intended or legal for use on any pollution controlled motor vehicle, device or system.