DHM 149cc BBK Kit (2022+)

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After over a year of development, DHM's 149cc kit is ready to go! Kit includes: 55mm Forged Piston with RK 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. DHM ECU flash or an aRacer MiniX and AF2/AF3 combo will be required for proper installation. Install Notes: Two base gaskets included. Use both copper and paper gaskets for pump fuel, use only the copper gasket if you are running race fuel. Oil coolers are highly recommended. Keep an eye on oil temps. An NGK CR9E spark plug must be used Ring gaps must be set during install, we recommend .011" on the upper ring and .013" on the lower ring 91 octane is the bare minimum, and 93 is preferred. When using aRacer, download the quick burn for 149cc + S1 cam Honda injector 16450-KZY-701 is the recommended injector for this kit. Show more