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DHM Stage 3 Kit for the 2022+ Honda Grom / Monkey

$450.00
by DH Motoring
ECU Core
Camshaft

**Professional install is highly recommended. Ring gaps must be set, and base gaskets must be installed properly. Setup sheet is included. 


The DH Motoring Stage 3 Package includes the following:

Combined with your aftermarket intake and exhaust, this is the most you can get out of your Grom without doing any head work. After dyno testing we were repeatedly seeing 13hp at the wheels (SAE) run after run! The Stage 3 package makes more power than a stock Grom at every RPM and double the horsepower at 9000+ rpm! 91 octane fuel is absolutely required. Any fuel with a lower octane rating may result in engine damage!

You can choose to receive a preflashed ECU instead of sending yours in or you can send yours in to be flashed. 

An oil cooler and extra crankcase vents are recommended for this kit. 

We offer the following crankcase vent systems:

AvailMS Crankcase Vent 

MO Power Crankcase Cover

Oil Cooler Kit: Kitaco x DHM Oil Cooler Kit 

Customer Reviews

Based on 22 reviews
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A
Abdul Abu
Lil Dragon breather

She can breath a lot better now. EZ 60mph with no issues. The only issue I've encounter is the bike gets a little choppie in 3 & 4 gear about 7k RPM. I've reset the ECU,Tps and still the same issue.

F
F.V.

Great product, would recommend and great company.

J
Jay B.(Ghost_Gr0m)
Great customer service

We installed the parts and it sounds amazing the lady I talked to was so amazing and helped me figure out what I needed for my bike to perform well also recommending parts I need to make sure my bike doesn’t blow up lol

D
Denis S.
DHM for the win!

The DHM team is amazing, offering the best premium parts you can find online. I installed the intake, exhaust, and DHM tune, and I was blown away by how well my 2025 Grom ran. Then I decided to push the limits of power without going with a big bore kit, so I pulled the trigger on the DHM Stage 3 — and it feels like a brand-new bike! After my purchase, I was so excited I couldn’t sleep, so I emailed the DHM team to request overnight shipping for my kit once they received my ECU. They communicated exceptionally well, I paid the extra shipping cost, and they made it happen. For reference, I placed my order on Monday, and by Thursday night, I was already installing parts.

R
Ryan Mccrea
Definitely worth the money.

I finally got it installed in my wife's bike. After a little troubleshooting and resetting the throttle position sensor very happy with the product and the performance easy install. Thank you, dhm.
Ps if you install this kit and your bike struggles. At around 7000 to 9000 rpms, reset the throttle position sensor.

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