The frame on the RMX is basically a 2009 RMZ with a 2010 swingarm. The Rmx has been accused of being too much motocross bike and not enough off road bike. I'm not too sure about trying to switch parts as the starter and mech really won't work on a Rmz engine. You might get better results with hotter aftermarket cams on the RMX. The milder head and cylinder are similar but different to accommodate the starter system. The stock rmx needs an aftermarket fuel system like a JD or vortex unit to run mx speeds.

No clue really. The vortex unit is the same for certain years of kx450 and Rmx450z. I guess it depends on if the ecu is locked or not. Ask Tokyo Mods or Twisted Development.

If you have a non restrictive ecu running the cherry bomb I would probably just stick with it. My '17 USA RMX had the ECU with only the restrictive map and not the performance map. The cherry bomb on non locked ecu's allows the bike to use the performance map. The early and non USA ecu's had two maps. Stock plugged up map that was designed to be used with the airbox snorkel, throttle stop, and exhaust muffler reducer(pea shooter) and a performance made for an open airbox and free flowing MX style muffler. Once you remove all those restrictions your bike will need more fuel which the vortex delivers. My '17 USA rmx needed a fuel performance system to not run lean once the restrictions were removed.

@burstcasino ah right so my system is better? For being stock and uncorked? Because does yours do a low idle then kick to a high idle after a while? Because that's what mine does

@@Gtdubsterx7 My USA '17 Rmx needed extra fuel(vortex, wiseco dobeck box, etc) as I had removed the restrictions and it was running hot and lean. The vortex allows for different states of tuning. I wish the vortex had an application to fine tune the ten different maps like the GET ecu. There is a vortex software but it is $$$ and not readily available. I set my idle to about 1900 rpm and it generally stays there after a proper warm up.

@burstcasino yeah we adjusted the idle to the higher side of the idle rev range but I think that the cherry bomb may be a little bit older so it's not talking to the bike properly because from what I've been told it's not supposed to go from low idle to high idle all the time so I may just need to buy a newer cherry bomb because that bike sat in a guys room since 2016 and bought in start of 2023 so whats that 7 years

@@Gtdubsterx7 I think the Cherry bomb dongle is just a resister that triggers the performance map in the ECU. I don't think there is any intelligence in the CB. I remember reading reports of guys making home made Cherry Bombs. If you remove the Cherry Bomb as a short test, you should be able to tell a difference. If it starts to backfire or run hot then reinstall the Cherry Bomb. At least you will know if the dongle is accessing the performance map. good luck

I like the performance of the vortex but wish the tuning software wasn't so expensive or impossible to get. The Dobeck unit worked ok but not as good as the Vortex. I found a new other unit for $$.

@@burstcasino I appreciate the insight. There is an RMX for sale by me for $6k. I’m considering buying it but I wanna know I can be covered with the ecu. Obviously the less I spend the better, but I don’t want to compromise reliability. I don’t like how the Dobeck runs hot and doesn’t like to cold start, but I also don’t like flame outs either. What ECU do you have now?

​@@MitchemousPrimeThe dobeck/Wiseco unit ran ok. It didn't run hot and did solve that issue. I'm running the vortex now with a FMF Ti Powercore muffler.

@@burstcasino okay, I guess I had misread that. So you do think the Vortex is worth the extra coin then?

​@@MitchemousPrimeAt $799 it's kinda steep, but I got one for about $450. See if Athena Get makes one for the RMX. The newer RMZs come with a Get ECU and come with free software.

Well... Its kind of a mixed bag. I'm running a FMF pipe with a sparky installed but a lot of the maps are for fully open and loud pipe setup. I tried those maps and they did give more power thru out the spectrum but also introduced some weird flame out issues. I tried the the torque map and it did great in a single track scenario but wasn't a MX map by any means. Less top end but a ton less flame outs. I need some more testing on the map that is for the MX pipe with a sparky or db insert. It seems to work well but I did need to bump up the fuel on the individual low end trim pot as it seemed to run hot. I really need to spend more time with it but in reality I have been fine tuning my 300 2 stroke. I plan on some testing soon as I'm gonna run a Cross Country on the RMX soon. Here's the restricted MX map without tuning the low-med-high pots... kzfaq.info/get/bejne/atR0jaeUtqjDhIk.html