The DH Motoring Stage 3 Package includes the following:
DHM ECU Flash
DHM High Compression Stock Bore Piston
TB Camshaft or Decha HR Camshaft
NGK CR9E Spark plug with spacer
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 ($115 extra), or you can send yours in to be flashed.
An oil cooler and extra crankcase vents are recommended for this kit.
I’ve only rd it for about 45mins, but seems to be made good, feels lil sluggish down low on rpm, but up in the upper it comes on with it, I also bought the dhm cylinder with oil ports, they done gaped rings for me for there cylinder
C
CrAzy Carl
Best bang for your buck
SHORT AND SIMPLE
You simply can't beat the performance of this kit when wanting a reliable set up that doesn't break your bank account. Its an easy 10/10 recommend from me 🤝
F
Frank Bulard
De Stage 1 à Stage 3
Tout est parfait. Le site, la facilité de commander, même de France. L’envoie est rapide et le colis parfaitement emballé et protégé. Les pièces sont de qualité. Mais le grand + est la rapidité de réponse en cas de doute ou de conseil pour le montage et le réglage. Merci beaucoup à DH Motoring.
J
Joe Greene
DHM3
It is good, rings were almost outta spec but we made it work. Going to order some new rings and get it dailed a bit better.
E
E.H.
The grom rips now!
As soon as i got the kit threw it on in an hour and it rips have put 1200 miles on it wide open 90% of the time and not a single issue. Im 160lbs and it will do 65-70mph no problem and plenty of power for wheelies.
