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

DH Motoring

Sale price $275.00 Regular price $335.00

Shipping calculated at checkout.

Customer Reviews

Based on 36 reviews
Christopher Lingnau
Solid upgrade

I'm 5'9" 375 , I currently have 14/37 gearing , Amazon $80 exhaust , mnnthbx mtake and 60% clutch springs. Bike does 73 mph on flat ground. Pulls well in the higher rpm's. I'm happy

Christopher Shannon
Great performance pick up

Great service. David was a great help.did the Stage 3 kit. Will do to any Grom/Monkey I own.

Malcolm Cooper
Stage 3 2014 Grom

Absolutely recommend this if your looking for a simple but reliable upgrade. Great customer service and the bump in power is definitely very noticable.

Joaquin Anglada Mulero
Muy bueno

La atención exelente, muy rápido y atento, el kit va de lujo.

Stage 3

Excellent setup, would recommend to any grom owner.

The DH Motoring Stage 3 Package includes the following:

DHM High Compression Stock Bore Piston
TB Parts Camshaft
NGK CR9E Spark plug with spacer

Honda Monkey Stage 3 kit is available HERE

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 13.5hp 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. You can also choose to receive a new cylinder matched to the piston if yours is worn. 

This product page is for customers that do not currently have a DHM flash or cam package. If you already own our reflash or cam package, you can purchase the Stage 3 Upgrade HERE.


Install video: