100% worth it
Install was easy, parts were of great quality, first 100 miles i took it slow to break in, after about 300 miles of just casual highway and city riding, my piston and rings melted...
I order the stage 3 kit and installed it. Install went very smoothly and now the grom runs like a should will definitely be coming back to get more stuff from dhm
Good kit for the money power is very noticeable only reason for 4 stars and not 5 it could of came with more info like ring end gap specs and valve lash recommendations but all in all great kit and Dave is very helpful I would recommend
Man this guy knows how to do business. Had a question about this product answered within a day. Got my Ecu back in a week flat. Love the set up great jump in power very satisfied with this kit Highly recommend DHM if anyone’s on the fence about it
***Orders are now shipping in 5-7 days from order date!
The DH Motoring Stage 3 Package includes the following:
DHM ECU Flash
DHM High Compression Stock Bore Piston
TB Parts Camshaft
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.