DHM ECU Flash Update – Honda Grom & Monkey (All Stages)

DHM ECU Flash Update – Honda Grom & Monkey

Already running a DHM-flashed ECU and made changes to your build? Get your tune updated to match your current modifications. Select the option that matches your mod combination, check out, and you’ll receive a confirmation email with shipping instructions. Fast turnaround, precise fueling — dialed in by the same team that built your original flash.

Available Flash Options

• Intake / Exhaust / Cam — Stock bore Grom or Monkey with aftermarket intake, exhaust, and camshaft. You’ll submit your exact mods via Google Docs form after purchase.
• Intake / Exhaust / Cam with TB Cam — Same as above, includes a TB camshaft in the package.
• Stage 3 — Stock bore with a high compression piston, intake, exhaust, and camshaft. Mod details submitted via Google Docs form after purchase.
• 186cc — TBParts 186cc kit with PCX150 injector, intake, exhaust, and camshaft. Mod details submitted via Google Docs form after purchase.
• DHM 149 Kit — Tune update for the DHM 149cc big bore kit configuration.
• 2022+ Intake / Exhaust / Cam with DHM S1 Cam — For 2022+ Grom only. Includes the DHM S1 camshaft in the flash package.
• Custom — Non-standard build. Confirm your setup with Howling Moto before ordering.

How It Works

1. Select your mod combination from the dropdown and complete checkout.
2. You’ll receive a confirmation email with shipping instructions for your ECU.
3. Ship your ECU to Howling Moto for reflashing.
4. Your updated ECU ships back, ready to install.

Fitment

• Honda Grom OG (2014–2015)
• Honda Grom SF (2017+)
• Honda Grom JC92 (2022+)
• Honda Monkey 1st Gen & 2022+