DHM Performance ECU Flash for the 2022+ Honda Grom / Monkey / Dax

Good in low gears, dropped off in 5th

I have a 2022 Grom with a Chimera intake and full Yoshimura low mount exhaust. 1st-4th have a noticeable increase in pep and smoothness. Mid to high rpms are much easier to ride in now. But 5th gear is pitiful. If there is even the tiniest head wind I'm finding myself slowing down, with the throttle wide open, to below 50mph. With no tune and only the exhaust I was able to cruise comfortably at 50-55 with a mild head wind.

Great service

Have not installed it yet because I’m waiting on some other parts to arrive, but so far I’m pleased with the customer service answering questions and responding fast to my inquiries. Shipping was fast and simple . I’ll update more of a review when I get everything put together.

Awesome DAX now +4mph

I have a 2025 Honda DAX with 93 miles on it. Stock the fastest I could get it to go was 50 MPH. Installed a man in the box intake and I could do 54 mph. Did the DHM reflash for intake only, I do not want to add an exhaust and make it loud. I did the 10 to 15 mile break-in period. At 10 miles in on the ride, I could still only do 54 mph by the time I hit 20 miles into the ride I was hitting 58 to 59 mph. Same 20 mile ride for all three outcomes. Much better throttle response/torque in the low and mid range. HAS POWER THROUGHOUT THE WHOLE RPM RANGE IN EACH GEAR! Should’ve done this the day I bought the DAX!.