Just wandering, if the cbr 600f is more happy at around 6000 rpms and higher,(and mine is very happy at this rpm) would you improve the low end at all?

 

nothing you can really do about it. high performance inline 4 motorcycles are meant to be revved. thats just the way it is. you can adjust some of it on the newer fuel injected bikes with a power commander but its not much. just be happy that it revs as quick as it does and twist that throttle! besides, its sounds much better at redline.