DHM 149cc Big Bore Kit for the 2022+ Honda Grom
DHM 149cc Big Bore Kit for the 2022+ Honda Grom
...

DHM 149cc Big Bore Kit for the 2022+ Honda Grom

$349.00
DHM 149cc Big Bore Kit for the 2022+ Honda Grom

DHM 149cc Big Bore Kit for the 2022+ Honda Grom

$349.00

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
Product description

After over a year of development, the DHM 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.

Our ECU flash or an aRacer MiniX and AF2 combo will be required for proper installation.

ECU Flash located HERE

aRacer MiniX HERE and aRacer AF2 HERE

Extra crankcase vents are also recommended, using either of the following:

AvailMS Cam Cover Vent

MO Power Vented Cam Cover

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 quickburn for 149cc + S1 cam
  • Honda injector 16450-KZY-701 is the recommended injector for this kit.

Download setup sheet HERE

Installation:

<iframe width="970" height="546" src="https://www.youtube.com/embed/9Th0_Atnsno" title="DHM 149cc Big Bore Kit for the 2022+ Honda Grom and Monkey!" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

      Shipping & Return

      Shipping cost is based on weight. Just add products to your cart and use the Shipping Calculator to see the shipping price. Please contact us if you have any questions.