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Message: <blockquote data-quote="mcgovern61" data-source="post: 20733" data-attributes="member: 59">First thing I did was soak them with ATF for a week.  Today I had my first chance to take a look at them (pretty ugly :smilie_happy: ).  BUT....the ATF is a miricle oil!  With a few taps on the bolts....they came right out! :clapping:   Also....turns out the last time the PO worked on them he used never sieze on the threads! :music:  :clapping: I removed the left caliper from the bike and installed one of the '82 calipers and filled the master cylinder up and started pumping.   After sitting for the better part of 15 years rusted and stuck, the pistons popped right out! :yahoo:   The ATF did a great job breaking down the rust and loosening everything up.  I now have the pistons sitting in a coffee can of brake fluid.  Luckily the pads were not worn too bad and pistons were pretty far inside of the calipers and only about 1/2" of the pistons were exposed and rusty.  They wire brushed off real easy! (Gotta love stainless!)  Now for new seals, speed bleeder screws, new banjo washers and paint!Any suggestions on the best method for cleaning up the calipers inside and out before paint?</blockquote>