DHM 149cc BBK Kit (2022+)

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.