Reason

Another "please diagnose this noise over the internet" question.

The bike has had an on-throttle rattle in 6th gear since I bought it 3.5 years ago.

I had the sprockets and chain replaced by a shop I trust a couple weeks ago. I still have the noise, and I also have what sounds like a gear whine. It's also on-throttle only, but appears to increase in frequency as I upshift, so it's at its highest pitch in 6th.

It's a DID, I believe a 520, don't have the invoice handy. It's my first new chain - is this normal? Break-in needed? Should I bring it back to the shop? Thanks for any pointers.

8541Hawk

Well it is really hard to tell but a few things.....

What is the rear sprocket made out of? And is it a different type of sprocket or material than the one you replaced?

Also the chain could be too tight, how much free play does the chain have?

Old Yeller

are the rubber/plastic chain guides on the swingarm ok? Also be sure of the clearance of the chain on the exhaust pipe just under the front.