Every time I fire my new Bengal there is a pinging noise that is coming from the idler wheel. Have you heard of this before? I have tried everything I can to stop it, including putting mole skin around the the outside of the pully. This seemed to help but the noise is still there.
***NOT A TECH ***but ..
Well, first I would use some extra fine graphite and just try to work it in around the idler wheel ..? next if you can take it off and clean it good and then put the graphite inside and reinstall ..or take it back to the shop it was bought at and have them look at it .. hope that helps ...