My 1996 YZF1000R has just hit 72k and I am hearing a slight rattle in the engine when cold and the hydraulic clutch friction point is at the end of lever travel(not slipping tho). Friend of mine reckons jap bikes need to have the cam chain replaced after 45k.. manual doesn't specify when it needs to be replaced but it looks to be a major job to do(engine out and split). As for the clutch.. would one expect to get much more than 72k of life out of it? could a worn clutch introduce the slight rattle I am hearing when cold? Suggestions on how to proceed here? Thanks guys.