NCY 61mm 171cc Cast Iron Cylinder Kit with Cast Aluminum Piston. Give your GY6-based scooter some serious power with this 171.3cc bolt-on kit for most 125/150cc GY6 engines. To our...
NCY 61mm wear-resistant 2-valve cylinder head with a larger 27.5 intake/23.5 exhaust ports will allow your GY6 cylinder to breathe better. Works great with the NCY 171cc GY6 cylinder kit...
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