Ok i just got a 2005 zx10r and it seems like when im WOT everything is fine but when i let off and get back on it theres a huge delay then takes off hard. It has a full two brothers exhaust system, power commander 3, k&n air filter, and an ivans timing retard sensor. I've had the power commander re mapped and is running better but it still isnt completely fixed. It still seems like its running lean. I was thinking it was either the fuel pump or dirty injectors but someone also said it could be the computer. Any body got any input??????