Honda Monkey Stage 3 | DHM Piston, ECU Reflash, and TB Camshaft

DH Motoring

Sale price $285.00 Regular price $335.00

Shipping calculated at checkout.

Customer Reviews

Based on 5 reviews
Paul Vallejo
Worth the money

This kit (with the addition of a scorpion exhaust and chimera intake) has reduced a group of middle aged men into giggling children. With a full tank of 93.5 (98ron) the monkey got me (146lb/66ish kg) up a slight incline doing 57mph in 2nd gear. Installation was straight forward enough, with all parts included including some much nicer wrist pin clips than the annoying stock ones. Make sure to adjust the valves as per the provided sheet rather than the values stated in the workshop manual

Brandon Cheney
Made my Money 125 feel like my CRF250l

Absolutely great power! This with exhaust and intake took me from 52-55 untucked to 65-67mph!

Mike Moody
Well worth it

Parts were shipped fast, Dave answered a couple of installation questions quickly and was super helpful.
My Monkey with the Stage III kit, intake, exhaust and re-geared is now 10 mph faster than stock under identical conditions and much more fun to ride.

Great upgrade

Went from the stage 1 package to this and noticed a significant improvement. Highly recommend if you don't wanna go big bore

Kyle Mahle
Stage 3 monkey kit

Bought this kit after doing an intake, exhaust and ecu tune for those mods. Wow did this kit really liven up the bike, this is how the bike should of came stock. I highly recommend ordering this if you are wanting more fun with the stock cc.


We are currently backordered on pistons. Orders will ship by the end of February (but hopefully sooner)

We're proud to release our Stage 3 package for the Honda Monkey! If you already have an intake and exhaust, this package can take you to the next step. If you already have a cam, even better!

Stage 3 Includes:

  • DHM 13.2:1 High Compression Piston
  • DHM Stage 3 ECU Flash
  • TB Parts Camshaft (can be purchased without if you already own one)

Check out our Blog post on the development of this package here!

This package picks up a 65% HP gain over a bone stock bike, and netted us nearly 14hp at the wheels! It does require that you have your own aftermarket intake and exhaust system. 

**91 Octane fuel or higher is required!

You will be required to either send your ECU in to be flashed, or pay a separate core fee to receive a preflashed ECU. 

**Existing customers can check the drop down menu for savings if you already own our Stage 1 flash, or Cam Package.

Install video: