I have a 2005 cbr600rr. It currently has a RS-5 slip on and I just bought a Jardine 4:2:1 header for it. My question is whether i NEED to re-map it with a power comander or will it be alright running on just the stock ecu?I'm worried about it running too rich.

any advice or answers would be appreciated.

 

I would advise a PC and a dyno tune. It will most likely be running leaner with the header