Hi Guys, I'm having a problem with the revs breaking down on my 2004 ZX10R. It's been a track bike for the last 2 years, and when I come out of a corner onto a straight and fully open up the throttle, the revs start bogging down at 8,000 RPM, taking a long time to reach 10,000 RPM and by then I'm at the end of the straight not having changed gears once. I've tried at half throttle, and slightly improves response, but the revs still bog down. It's not like a rev limiter effect, it's feels more like a poor fuelling effect.
Thinking it may be the plugs or air, I pulled them Iridiums out, adjusted the gaps and cleaned the K&N air filter. On the next track day, the problem remained the same. Can anyone help with suggestions as to what could be the problem.