FZRSupport: the FZROnline Archive

I posted this in FZRarchives, but figured i'd post here for any experience:

Hey guys, I've had this chatter/rattle noise in the top end of my FZR for a while. Anyone have this or have any ideas what it might be?

This is not my video but it sounds just like this: (it's not the Knock Noise; it's the 'zzzz zzzz' sounding chatter noise)

Sorry explaining and diagnosing noises over the internet is tough...

http://www.youtube.com/watch?v=CW5p1r_6LJI

Have done any work to the engine. Sounds the the cam chain.