Just rebuilt the calipers a couple weeks ago also, so no pistons should be sticking. Pad deposits are always a possibility, but again I keep seeing this same problem putting on new rotors, on the first trip out to bed them (and I usually only lightly bed them since I can feel the vibration and know it's all a waste at that point). Haven't run at the track lately since I can't fix this, so I haven't heated anything up enough to distort/warp anything. I guess I'll try another new pair of front rotors, but take them to a machine shop first to verify their level of perfection and/or correct on a lathe?
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