Koso 170cc Big Bore Kit - Honda Grom  MSX125

Koso 170cc Big Bore Cylinder kit for Honda GROM / MSX125

Want to unleash all the power your Honda GROM can handle? Our 170cc Big Bore Cylinder kit for Honda GROM is the perfect addition for you ! The kit includes a ceramic coated cylinder, 61 mm forged piston, rings, pin, gasket kit and banjo bolts. Its compression ratio of 11.5 to 1 will allow you to still use premium pump gas and keep the reliability of a stock motor. Made from the best components available on the market, our 170cc GROM® big bore cylinder kit will amaze you  !

- 11.5:1 Compression Ratio
- Forged 61mm Piston (169.2cc)
- Aluminum / Ceramic coated

All of the above parts are not legal for use in California on pollution controlled vehicles. (Road going vehicles) However a race waiver is available.