Wow, of the three times I was examining how to get the cover off, I never got my head low enough to see these. So could we not just give a blast of air into one hole to clear the soot out the other?
I notice when I'm out for a while and eveything gets hot, I smell burning rubber, ever so faintly...it was much more noticeable on my very first ride. I had no concern as I figured it would be the belt shavings.