Thoughts on my rear piston?

[fastbysuzuki]

I saw today the Euro is very close to par with the dollar. Might be time to return the favor and come buy your old bikes....

Sorry to disappoint but in the uk we do not deal in euro's

[eil]

I figure worst case, both pistons are garbage and I'm only out $10 and go new.

Chances are fairly good the piston is pitted in that one too. I haven't seen a set of original calipers opened up that didn't have pitted pistons. What usually happens is that people forget that the brake fluid (and lines, if they're the original rubber ones) have to be replaced every two years. And then the fluid never gets changed because the brakes just keep on working, despite the neglect. As the fluid ages, it gradually absorbs water over the years. That water in the fluid then eats away at the pistons. Or they just don't ride the bike for decades on end and the same thing happens.

Maybe these are fine, just reporting what I've seen. Better to crack them open sooner rather than later to find out for sure.