Koso 170cc Big Bore Kit - 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 On the piston
     - Forged 61mm High Compression Piston (169.2cc)
     - Lightweight Aluminum / Ceramic coated cylinder

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

Please call us with any question and one of knowledgeable and friendly staff will help you at 833-327-8507