Well so far got driver side caliper tore apart. It looks pretty good(as far as no corrosion or stuck pistons). But was filled with a lot of black sludge. Also I learned when you paint your calipers don't paint where the pads sit. (dumb move) Had to tap the pads out of caliper on the bench. Going to put in the new seals and boots remove paint on the pad contact surfaces, then reinstall. Then work on passenger side.
I don't know what you did to ruin the M/C, but the usual manner of removing the seat was to screw an appropriate self tapping screw, (supplied in the M/C overhaul kit, along with 2 new residual valves and new seats), then use a suitable plier, I like the sidecutter, to grasp/pry the screw/seat outta the bore..
I didn't know how to get them out. Used some odd methods an made a mess of it. But I agree with nm9stheham that it wasn't the right Mc anyway. Now that I'm going to need a new one, trying to figure out the right one for 4 wheel disks.