***Update 6-3-24, The Decha HR camshaft has been added as an option. It provides the same gains as a TB or DCR R2 but with a different lobe design that is not as noisy due to a larger base circle diameter.
****DOES NOT FIT THE 2022+ HONDA GROM/MONKEY, for the 2022-2024 model, click HERE
If your Grom already has an intake and exhaust, this is the next step!
We've created a camshaft package that allows you to add a Decha HR or TB Parts camshaft and our DHM Reflash to your bike. This will add as much as 2-3hp and will also increase your rev limit to 10,000 rpm, while also correcting the fuel and timing tables in your ecu. Your Grom will experience much stronger high RPM power, as well as the ability to pull to higher RPM before shifting. After tons of dyno and street testing, we feel this it the best bang for buck upgrade available!
Benefits: Corrected Air/Fuel ratio for your exact modifications Increased ignition timing for throttle response and HP 13+ HP depending on your intake and exhaust setup 10,000rpm rev limiter Normal cold start functions (no bad idle issues when cold)
***Each tune is catered to your exact modifications (intake, exhaust and cam brands, etc.) After checkout you will receive a link to an online form that will ask for your bike's exact setup so we can tune it accordingly.
You have two purchase options for delivery. Once you've completed the purchase, we will email you with instructions on sending your ECU in to be reflashed. You can also choose to purchase a core ecu, we will send you a flashed ecu and you can return your original one and receive a $50 credit or keep it as a back up.
Kit is great easy to put in power is there I’ve beaten the piss out of my bike putting it on limiter and it sounds much better and it takes it
A
Austin Lane
Great power gains and fast service from shipping ECU to getting it back
J
Jacob Carrier
Perfect product and service
Installed the decha hr cam and reflashed with my current intake and exhaust. I now hold and even gain speed up hill at 60mph and hit 70mph on flat easy, tops 74mph with a 14T front. Holds 60+ all day with hills and wind.
R
R.F.
Cam, Intake and tune package
Installation of kit was straight forward and fairly easy to do.
Performance is very impressive, far more than I ever expected from a 125cc. My 17 Honda grom has picked up alot more power from 6k right up too 10k rpms. Surprisingly, my new top speed on a good day is 87Mph unlike before at 75Mph.
Overall, very happy with the purchase.
B
Ben Walker
Stage two tune
Bought the stage two tune with a ecu reflash fitting was straight forward ran okay for 400 miles then engine lost all power upon inspection found the piston and barrel had Overheated due to the wrong air fuel ratio (running to lean) bike only had 1000 miles from new so fitted new piston and barrel put stock ecu and cam back in and runs like a dream was told by DHM my timing must have been out to cause this been working as a bike mechanic for 15 years so I no how to time a bike up !!! Personally I wouldn’t use his reflash unless you want to blow your engine get Power commander and set up on the Rolling road
You sent us a photo of a damaged piston where one of the valves had made contact. That does not happen from a bad air/fuel ratio, it happens when the cam timing either jumps or has slack from an issue with the tensioner.
