Koso 170cc Big Bore kit with 4 Valve Cylinder Head kit - Honda Grom MSX 125

NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION-CONTROLLED MOTOR VEHICLES170cc Big Bore kit with 4 Valve Cylinder Head kit for (2014-2020) Honda Grom MSX 125 and (2018-2021) Honda Monkey 125.This complete 170cc Big Bore kit with 4 Valve Cylinder Head kit is the perfect add‑on for all horsepower enthusiast looking for performance! It includes : a 170cc ceramic coated cylinder, forged piston, performance camshaft, crankshaft bearing, rocker arms, 4 valve cylinder head, intake manifold, gaskets, and more. All parts are made from High‑quality components for reliability and durability that allow you to put your mind at ease and ride with confidence!NOT AVAILABLE FOR SALE OR USE IN CALIFORNIA.NOTES:Aftermarket fuel controller and upgraded fuel injector is required. Professional installation is highly recommended!Performance upgrades to the clutch is highly recommended!Disclaimer: NO WARRANTY ON RACE ENGINE parts or engine bore up kits. There is no warranty stated or implied due to