No.
Unless, of course they've been neglected.
![Roll Eyes ::)](http://forums.sohc4.net/Smileys/default/rolleyes.gif)
You could try adjusting the tappets and cam chain tensioner, part of a major tuneup they should have every 3000 miles.
The clutch, primary chain, and transmission gears will clack and rattle if the carbs aren't in sync or equally clean.
If there is a specific noise you could localize, we might be able to address that.
Otherwise, flog it and throw it away when your're done beating on it.