Honda Grom/monkey Big Dog Bore Kit

Want to unleash all the power your honda grom can handle? koso's 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, koso's 170cc grom big bore cylinder kit will amaze you! cylinder displacement: 169.2cc. cylinder material: aluminum / ceramic coated. piston size: 61 mm. piston type: forged. compression ratio: 11.5:1. note: this is an aftermarket part built for racing purposes only. koso is not responsible for any damages caused to the parts, vehicle, or to yourself and others. engine parts are not under warranty nor is collateral damage or cost of labor, in cases of malfunction.