Are these Matco calipers? If so, I've found that I can "reset" the alignment by braking loose the two allen head screws, then retightening them. Seems to solve brake-line fitting induced sideloading on the secondary caliper body, which then in turn causes the caliper chatter.Would it be a problem to carefully lubricate the guide pins with graphite? I changed my pads and must have bent the tubing enough it causes them to bind and cant seem to get the tubing back to where it was,
Agree with @dougmattson - a little graphite shouldn't hurt either.
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