Engine rattle/tapping on startup

[skittles6969]

Hi,
When I had the 04 it had the same noise from 15000k until I sold it at 30 000k. Had it checked, put on a new cam chian tensioner just because I could, checked valve clearance all good had injectors cleaned nothing there. Tried different oils, same noise remained, yeah sounded as if was near the starter cover, so removed all of these to check, all was fine. Never got around to trying oil additives. At the end of the day put it down to the nature of the beast. The bike was still going strong until the day I traded up.

I was thinking of removing the cover for a look. There's a wave washer under there, on the idler shaft, that presumably stops the idler gear from rattling or vibrating. I was hoping it was either weak or missing. I'm hoping it's not starter clutch related.

---

Just to clarify, it's more of a whirring noise than the cold engine tapping noise they all make. Either a whirring or resonance vibration rattle. Between 2000-3000 rpm. It doesn't affect performance, but I'm very mechanically sympathetic, and would like to silence it once and for all.