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

Best thing ever ! And I installed it myself!! Plus Alex from dhm was really good on helping me out with any questions!! Best customer service!! 5⭐️

Blew it up

Recently got my build back from tuning. Was able to get ~15hp with the BBK and cam. Got er up to 78mph and held it for a couple minutes. Do Not. Things overheated and were damaged. Functional but damaged. Point being, I’m back purchasing and building again, this time with a bigger throttle body and intake manifold. Aiming for ~20hp. Although, this time keeping it out of redline. That’s a review.

Sounds Great

Sounds great went together with no major issues. I do recommend buying a new O2 sensor. We found it was hard to remove stock sensor from stock head. Would have upgraded starter but DHM did not have on site. Stock started works but it’s trying hard. Like a whole new bike using yosi loop exhaust, s1 cam, chimera intake and DHM ported head. Bike is so fun now!