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Hi everyone. I currently have a 2011 cbr600rr and I bought it with 18k miles on it. I just passed 30k and recently changed the oil and found some metal shavings on the magnetic drain plug. The first couple oil changes I performed would build up a paste on the drain plug but this time it had some fine shavings. The bike still runs strong but I also hear a slight vibration like sound (sounds like if the key chain was rattling) between 6-8k rpms. It only does it in gear too so I figured it pretty much rules out the CCT. I have a camera so I'm going to go back when I first got the bike and see if that sound has always been there and maybe I just didn't notice.

Anyways by the look of the drain plug is this normal wear for 30k or what could the problem be? I also checked valve clearance at like 25k miles and they were still within spec. Thank you.
 

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