I have a problem with my bike..not really a problem (i don't think!) as the bike runs fine etc..but when every i rev past 6000 rpm i hear a rattling noise...kinda like a pin being shaken in a tin, but this only happens past 6000. It must be pretty loud rattle cos i can hear it over the muffler.
Any ideas wat is it or if it's bad...cam timing gone wrong <---(kinda made that up cos someone told me about it before

thanks again
sorry 2000 zx6r