I recently purchased a 2002 cbr600 f4i that kept blowing a fuse, the one that is on its own leading from battery to relay.

I ended up replacing the ecu from a 38770-MBW-a12 to a 38770-MBW-D41 before finding out that the one i purchased was EURO version.

The fuse no longer blows and my F1 light is now on as soon as i flip the bike to run, it does not blink, only thing I am wondering is if the new ecu requires a alternate voltage or something in order to work on my US cbr.

I repaired a short in the headlights before replacing ecu and I have checked all fuses and tested the fuel pump by jumping it and it works also the BAS is bypassed so thats not an issue either

 

Take a look at this

 

I have and I am a little confused because i have the opposite situation, I have a USA bike with a Aussie/Euro type ecu.

So do I need one 12v power source in stead of two separate ones, if so I don't know which pins to change

 

hi it could be all about the pink wire from the ignition to the ecu, does the pink wire number 19 show 9vlts,this one is more about your bike
need help with my 02 F4I - Honda Motorcycles - FireBlades.org

you can use a 9v battery connected to the ecu ,wired in and earthed, if your getting 12v there