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Best bang for your buck is probably
https://www.cameronjonesracing.com/honda-grom/honda-grom-ecu-flash-service
https://www.dhmotoring.com/product/stage1reflash
or the Yuminashi replacement ECU
Piggybacks kind of suck on the grom. The stock ECU targets a certain AFR in closed loop. If you mess with the closed loop part of the map with a piggyback ECU the stock ECU will fight it. Then that effects the open loop part of the map. I don't have the best understanding of it or how to explain it but I think it's something like that.
 

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Best bang for your buck is probably
https://www.cameronjonesracing.com/honda-grom/honda-grom-ecu-flash-service
https://www.dhmotoring.com/product/stage1reflash
or the Yuminashi replacement ECU
Piggybacks kind of suck on the grom. The stock ECU targets a certain AFR in closed loop. If you mess with the closed loop part of the map with a piggyback ECU the stock ECU will fight it. Then that effects the open loop part of the map. I don't have the best understanding of it or how to explain it but I think it's something like that.
I agree with this. If you're only going with an exhaust, intake, cam, or any combo of those three a flashed ECU is the way to go. I have a Dynojet PowerVision 3 with WBCX and it works OK, but I have no need for it. A flashed ECU would have worked just as well and saved me money.


Missing the top of the line and best ECU- Aracer, why waste your time and money, get the Aracer and be done.
Most Grom riders have no need for aRacer in which case it's a total waste of money. Also, if a person needs support from aRacer it's apparently terrible so you had better buy it from a place that will stand behind it and also help you learn it.
 

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Quote Originally Posted by noob View Post
Best bang for your buck is probably
https://www.cameronjonesracing.com/h...-flash-service
https://www.dhmotoring.com/product/stage1reflash

I just purchased a stage 1.2 kit from Cameron, he was super helpful and answered all my questions. The kit consist of an intake, exhaust, cam, and ecu reflash. Makes about 12.5 hp at the rear wheel vs 8 hp stock. The performance change from stock is drastic, the whole persona of the bike is different. It wants to be revved to redline now instead of struggling past 8k.
 

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Discussion Starter #7
Quote Originally Posted by noob View Post
Best bang for your buck is probably
https://www.cameronjonesracing.com/h...-flash-service
https://www.dhmotoring.com/product/stage1reflash

I just purchased a stage 1.2 kit from Cameron, he was super helpful and answered all my questions. The kit consist of an intake, exhaust, cam, and ecu reflash. Makes about 12.5 hp at the rear wheel vs 8 hp stock. The performance change from stock is drastic, the whole persona of the bike is different. It wants to be revved to redline now instead of struggling past 8k.
are you actually being serious? That's exactly what I want done lol. I already got the MNNTHBX air intake, as well as the Yoshimura RS2. So I kinda don't want all that. However, if it's making 12.5HP and it actually wants to hit redline, I'm happy haha! That's what I'm lookin for. People said the same thing about the WR250R Supermoto. I dumped $1000 in performance parts, and BARELY felt a difference. Went from bone stock to: Full No Toil Air Filter Kit, Full FMF Pipe, EJK Fuel Controller, 13-47 Sprockets (orginally at 13/43), etc etc. So I'm really hoping the grom will be different, even a little is fine.
 

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The reflash is better bang for your buck. If you're going to spend the money for a PC5 might as well spend a little more and get the Aracer mini5.
 

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I am 6'1 and weigh about 175lbs before gear. With the dinger built intake, hindle exhaust, dcr cam, and CJR tune and a 14T sprocket I can hit rev limiter at 10,000 rpm in fourth while tucked. Even up slight hills, that is an indicated 78mph but actually about 73mph due to speedo error with 14t sprocket.
 

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So should I just flash my original ECU (or send in my old one) or should I get a PC5?
Definitly do the flash over PC5... PC5 or Pv3 is a toss up, if you are already knowledgable on tuning with pcv then go straight to pv3, but with your mods pcv will be fine, but would go Ecu flash before that.

The reflash is better bang for your buck. If you're going to spend the money for a PC5 might as well spend a little more and get the Aracer mini5.
This is what i would do regardless of build outside of ECU flash (for the money).... Aracer the deal HR gave me hands down a better deal than a brand new full priced pv5 and way more functions that are user freindly...

But yeah if you plan to grow your grom mods Aracer, if going to stay with intake exhaust and maybe a cam ECU Flash is the most cost effecive deal with results.
 

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why is that? Everyone I know runs a PC5
It's a piggyback ECU. You have to run all that extra wiring and connectors and stuff on the bike full time. And it's around 3 times as much money as a reflash. If you want to be able to reflash it yourself you can get a PV3. You might want to look at which off the shelf maps Dynojet has available for your year of grom. If you plan on doing those same mods in the future it might make sense to get a PV3. I asked hard racing if they had any maps for the takegawa 4v. They put one on my pv3 before they sent it to me but I don't think it's compatible with my year of grom or something. I can't even open it up to look at it.
 

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Discussion Starter #18
It's a piggyback ECU. You have to run all that extra wiring and connectors and stuff on the bike full time. And it's around 3 times as much money as a reflash. If you want to be able to reflash it yourself you can get a PV3. You might want to look at which off the shelf maps Dynojet has available for your year of grom. If you plan on doing those same mods in the future it might make sense to get a PV3. I asked hard racing if they had any maps for the takegawa 4v. They put one on my pv3 before they sent it to me but I don't think it's compatible with my year of grom or something. I can't even open it up to look at it.
I just want to do a MNNTHBX air intake, and a Yoshimura. That's it lol
 

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ARacer seems to be a nice buy if your going to continue to mod the grom and bbk it in the future but if your going to stay with the basics the re flashed ECU is the way to go
 
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