NCY 171cc Big Bore Kit – for GY6 150 / No case grinding


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SKU: C081 Category:


GY6 171cc (61mm) Cylinder Kit From NCY. Give your GY6 based scooter some serious power with this bolt on 171.3cc kit for most GY6 125/150cc engines. With this 61mm cylinder kit for the GY6 engine you dont have to bore the crankcase. With most 61mm big bore kits, you have to bore the crankcase to make room for the 65mm cylinder base external diameter but not with this kit because of the 62,5mm cylinder base. It also has a light weight cut-down piston to increase performance.