So I put a new Supersprox rear sprocket on the bike and during assembly, we noticed the new sproket sat slightly outboard from a perfectly centered condition as the original sprocket did. With the original sprocket, you could stand behind the bike and with the calilbrated eyeball, you could tell the front sprocket, the guide track on top of the swing arm, and the rear sprocket, were darn near perfect alignment.
But repeat above procedure with same eyeball, and the new sprocket sat just slightly outboard (to the left) of a perfect alignment condition. It is very, very minor to the tune of about 2-4mm...4mm worse case. Just enough to notice. I didn't even take a picture of it because I didn't think it would show up in the pic. You can not tell via eyeball method with the chain on.
Everything assembled together perfectly, new chain went on perfectly and everything. Fast foward 700 miles and did my first good cleaning since the install and here's what I discovered. In 700 miles, the chain has already worn the black finish off the sprocket. There is no similar wear pattern on the other side of the sprocket...it's black and looks brand new.
So what do you guys think?? Cause for concern? I would imagine swapping for a new sprocket would yield the same result.