There was a coating of blackish stuff on the clutch side of my front
rim that was hard to clean off... I believe now that it was fork
oil, flung off little bit by little bit for a week or so back when I
thought my fork oil leak was just a "ring around the slider"...
-Mike
Thanks for the info Mike. In my case it's defintely brake dust as I can wipe it right of with my finger or a rag of some kind. My concern was that the left brake pads would be wearing more than the right and was possibly caused the axle not being set correctly.
There isn't a drag of any kind on the caliper bolts but just excessive black dust.
I'll keep an eye out for any kind of other black stuff that looks like fork oil though in the future.