DHM 149cc Big Bore Kit for the 2022 Honda Grom (Gen 2)

Our second generation 149cc kit is now ready to go! We've made a few updates to make the install process easier and more simplified. We've also eliminated any potential clearance issues and streamlined the manufacturing process even further to help pass on savings to the customer.  Generation 2 updates: Wider skirt bridges for more squirter clearance One additional oil control ring lubrication hole compared to the previous piston Two additional piston skirt lubrication holes compared to the previous piston Compression on pump gas is now 12:1 to reduce detonation when hot Kit includes: 55mm Forged Piston with ring kit 55mm Sleeved cylinder  Base and head gasket set This kit provides a significant horsepower and torque increase across the entire rev range. Expect gains of 30% in the midrange over a bike with intake, exhaust and cam, and double the horsepower of a stock bike at 8500rpm. Our ECU flash or an aRacer MiniX and AF2 combo will be required for proper installation. ECU Flash