DHM ECU Flash for the Honda Grom 2014-2021

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About DHM ECU Flash for the Honda Grom 2014-2021
**THIS IS NOT FOR A NEW ECU, IT A ECU REPROGRAM/FLASH SERVICE** Mail-in your to ECU to be reprogrammed. Turnaround time is about 1-2 business days. DHM is here to offer you the original flash tuning solution for the Honda Grom / Monkey! The stage 1 software cleans up the air/fuel ratio and optimizes ignition timing on bikes with intake and exhaust modifications. Looking at the dyno graph, you'll see the blue and green lines that are the graphs for the stock, unmodified ECU. It runs extremely lean up top and therefore only makes around 6-7HP at 9200rpm. By controlling the air/fuel ratio we're able to extract up to 3HP more in the higher RPMs. The peak number is only about 1hp but in a race on the street the tuned bike will continue to pull gear after gear because it does not lose power after 7,000rpm. An ECU flash not only increases horsepower, but it also makes the engine run safer now that it has adequate fueling. ***This is the best alternative to a fuel controller, especially at the price point. You no longer need to spend hundreds of dollars on a tuner if you only have simple bolt-ons on your bike. If your bike is running a modified intake and exhaust this is your ticket to a smooth running bike with OEM like ride-ability. Since we retain the stock ECU, the bike will start, run and idle like normal, but will produce more and safer power throughout the rev range. Benefits:
  • Up to a 3HP gain at high rpm compared to an untuned ECU!
  • Raised rev limit of 10,000rpm (compared to 9250rpm stock) higher limits available upon request
  • Corrected air/fuel ratio
  • Additional ignition timing advance for improved throttle response and power
  • Revised fuel injection timing for better atomization
  • Higher top speed
  • Better mid range and torque
  • Optional tip-sensor delete
  • Optional cold-start high idle delete
  • Optional closed loop delete (will allow your piggyback to make changes to the closed loop portion of the map)
Available Tunes:
  • Stage 1: Intake and Exhaust mods
  • Stage 2: Intake, Exhaust and Cam
  • Stage 3: High Compression Piston, Intake, Exhaust and Cam
How to order: You can mail DHM your ECU and they will flash it and get it back in the mail by the following business day (1-2 day turnaround time). Emailed shipping instructions will be sent after purchase. Send your purchase receipt with your ECU to DHM to confirm the tune requested.  

1 review for DHM ECU Flash for the Honda Grom 2014-2021

  • Joseph Damiano

    I bought the stage 2 for my 2018 Grom abs instead of the stage 1 cause I modified the throttle body and bored out my intake on top of the exhaust and cold air intake didn’t have cam but it’s been ordered amywhos this was the best mod I could of done.. She pulls and pulls and pulls. I couldn’t believe it. !!! DHM thank u for taking care of me whatever magic u do to the ECU it truly makes your bike a freaken animal.. I’m happy with the results and I def recommend any body looking for some sick power for pennies compared to a dynojet or any other commander.. check it out for your self if u don’t believe me..thxs

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