What causes the rear disk to concave like mine. I had to replace the bearings in the rear swingarm and after romving the rear disk, i set in on the garage floor and it was about as concave as the come. I was talking to 93 "somehwere else" and he was telling me his did that, then another guy was saying his was that way on 2 occasions and he finally got one that didnt do it....any ideas?
