DHM 186cc Big Bore ECU Reflash – Honda Grom & Monkey
Already running a 186cc 2-valve big bore kit and need a tune to match? This is the dedicated DHM ECU reflash for the 186cc build — the same tune that produces 16.5 HP and 14.5 ft-lbs of torque when paired with the 186cc kit, a PCX150 injector, and an upgraded intake and exhaust.
Send in your ECU for a mail-in flash, or add a pre-flashed core ECU to avoid any downtime. If you have modifications beyond the standard 186cc setup, contact us before ordering to confirm compatibility.
Performance Output
- 16.5 HP and 14.5 ft-lbs of torque (with 186cc kit + PCX150 injector + intake/exhaust)
Requirements
- 186cc 2-valve big bore kit (already installed)
- OEM Honda PCX150 fuel injector
- Upgraded intake and exhaust
- Stock narrowband O2 sensor installed and plugged in
Options
- Mail-In or Onsite ECU Flash — $149 — Send your ECU in; flashed and returned fast
- 2014–2015 Grom Pre-Flashed ECU — Core ECU included, pre-flashed and ready to install
- 2017–2020 Grom Pre-Flashed ECU — Core ECU included, pre-flashed and ready to install
- 2019–2021 Monkey Pre-Flashed ECU — Core ECU included, pre-flashed and ready to install
Fitment
- Honda Grom OG (2014–2015)
- Honda Grom SF (2017–2020)
- Honda Monkey 1st Gen (2019–2021)
Need a full 186cc kit? See the DHM 186cc All-Inclusive Big Bore Kit.
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