I'm having a problem with my 09 ZX6 and looking for ideas. When I get on the throttle hard it falls on its face. Going slow the rpm's come up ok. I've cleaned the fuel tank/lines and put a new pump on it today. It does the same thing. Plugs look fine, idles fine too. Ran great last season and it started doing this this year. Any arm-chair ballpark ideas?

thanks,

Joe