I posted a thread a while back,,, with pictures,, of how I cleaned my rear brake pistons, using the metal polish and skate lace method. It worked so well,, I will be doing that in future. My bike has never rolled so freely. I used the same method on the front calipers as well. You may find it worth a read,,, cheers,, Cat'
Bit of an update,,, just because my most recent rear brake service is working so well for me. This is the 3rd time that I have polished my rear pistons with the above described method (Autosol metal polish and flat skate laces). Each time, I have experienced less and less brake drag,, which is quite a change from when I first got Blue STar. Extending and then cleaning the pistons with a toothbrush and brake fluid is just the start. Then dry, and apply the polish to a lace,,, and thread it back and forth in all directions, for 10-20 minutes,, till they each gleam, all the way around. Then I gently and slowly push the pistons back in using an old pad and C-clamp, so that they all slide in together and squarely. Other tell tale signs that brake drag is minimized,,, are "no dragging sounds" when on the center stand. The rear wheel spins a couple of full turns, by hand, when on the center stand. When you start up the bike,,, on the center stand,,, the rear wheel begins to slowly rotate forward on it's own. Just pushing the bike around in the driveway is noticeably easier. The only other thing I have done differently this time around,,, is to test a set of EBC rear pads. So far,,, they are performing just fine,,, at half the cost that Honda Canada would like to charge me. But the jury is still out, till they are fully spent. cheers,, CAt'