Hi all.

Went on a weekend trip recently & on our way back the bike started making a very strange noise coming from the front sprocket area.
It almost sounds like the chain is running at an angle... a strange grinding sound.
I've checked tensoin, lube, etc.
The copper-like "guide" on the inside of the front sprocket cover is slightly (very slightly grinded)
Any suggestions of what it could be or what else I can take a look at?

__________________
THE FUN STARTS WHERE THE TAR STOPS!