I spent an entertaining evening learning how to strip down, clean and rebuild the front brake calipers from my FZ6 and then getting a not very nice surprise...
The first problem was that, on one caliper, the smaller of the pistons would come about half way out, then, no matter what I did to block the larger one, the small one simply wouldn't shift any more.
Eventually I used a G Clamp to push it back in, kept the other one completely blocked, put something in the way of the smaller one, but so it would stop further out than it had gone before, then gave it as much pressure as I could from the bike pump I was using and, thankfully, it popped far enough out to get past whatever was making it stick.
I then "walked" them out by putting thinner blocks in front of them until they'd both got past the inner seals and I could just wiggle them out with finger pressure.
So I got everything cleaned up, new seals in place etc and started to reassemble it, but I couldn't get the pads to go back into place.
I know they were stiff when they came out, but I figured that was because they hadn't been cleaned for ages (or at all!) and they were on the sides that originally came from, because I was very careful about that, but I couldn't get them to fit back in place as they kept getting stuck.
Finally I looked up the code on the back of them and found the pads on a Russian website. It also had the details of the dimensions and some pictures of the bikes they were for.
I looked at the pictures. FJR, R6, R1, a 125... FZ6 Fazer? Nope, no FZ6 Fazer...!
So I tried looking up the dimensions for the FZ6's front brake pads...
The sizes of the ones I have are 94.0 x 41.0 x 10.0mm
The FZ6 pads are 93.8 x 40.3 x 9.8mm
So whatever Foccer put the pads on the front brakes, put the wrong damn ones on!!!
Ok, they are literally just about 0.2mm too big and they still work because I've been using them for years, but they wouldn't go back easily.
I then spent ages carefully grinding down the ends with a Dremel, shaving a fraction of a mil off, checking the fit, taking another tiny bit off, re-checking, rinse and repeat until they fit properly into the caliper bracket.
Unfortunately I think the place that put the wrong ones on isn't in business any more (they've been on there for a while), so there's no chance of going back and giving them a bollocking