Originally Posted by
XPat9
I should have taken a photo that shows the pile-up of metal shavings. It doesn't appear to be from the retaining bar which is below the idler wheel. And luckily the entire mechanism is far from the frame itself. The chain comes well lubricated.
Your "metal shavings" appear to be from the idler wheel making contact with the aluminum chain guard plate. Bend the chain guard plate into an arc