This kit really woke my Grom up. I feel like this is what a lot of people wished their stock Grom felt like out of the gate. I think I’m a bigger rider for the Grom at 6’2” 265, and I’m getting 65 mph no tuck with room to go on a 14/36 428 setup and taller than stock tires. I’m also running and recommend the titanium axle/swingarm bolt set. As his reputation precedes him, Dave is very supportive gaining yet another repeat customer. DHM = money well spent.
Honda Grom Stage 3 | DHM Piston, ECU Reflash, and TB Camshaft
I took me quite some time to get my ECU shipped to them but once they received it. My ECU and the items paired with it were shipped back to me the same day! They are now installed and im beyond impressed!
Grom stage 3 kit is awesome. Gapped rings and installed in about 1.5 hrs. Bike fired right up. Added the missing power I was looking for.
Paired with chimera intake, Vance and Hines hooligan exhaust, 428 sprocket conversion 14/36
Motul Grom Race oil, Sunoco racing fuel 100 octane… Overall bike is bananas you will have no issues Hitting high 80s I’m 6”0 175 and I ride this is NYC Astoria
The DH Motoring Stage 3 Package includes the following:
- DHM ECU Flash
- DHM High Compression Stock Bore Piston
- TB 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 ($95 extra), 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