Okay, today I went for a 50 mile ride. I've taken the rear caliper off completely and the wheel turns really smoothly; whatever tightness was there yesterday (after reassembly before the ride) has now gone. I'm confident the back wheel is fine. I've given the rear disc a thorough going over with brake cleaner, even into the holes and I'm sure that's not contaminated now. In taking the caliper off, I spotted something (that I'd not seen in my unlit garage), that there are 3 bevels in the larger (foremost) of the caliper retaining bolts. They appear to be equidistant, which makes me think they should be there, but I thought I'd check. In this picture, the 3rd one is out of shot.
About 4mm down from the top of the smooth section (at the end nearest the thread) there appear to (can't see this in the picture) be gouges running around the bolt, just below where it flares out.
I also noticed when getting the bolt out that after undoing it all the way, it stayed stuck in the hole just rotating when I turned it (without coming further out) and I needed to grip the edge and pull fairly hard it to get it out.
Just thought I'd check this was all normal before I put it all back together as the replacement (new) bolts for both of these should be arriving soon and if there's any chance they could be the problem, I'll wait.
Once again, any comments/observations much appreciated, thanks.
BTW Whilst at Halfords getting some more brake fluid (in case it needs bleeding again), I picked up a model Hayabusa to assemble. Thought I'd keep my hand in while I wait on parts.
