Rear Brake refurb

[Fazerider]

[quote author=Fazerider link=topic=26027.msg311411#msg311411 date=1585523927]

If you’ve avoided wet and salty roads it’s a fair bet that the pistons will be fine. I've never needed to split calipers... i see which piston moves easier then use a small G-clamp to hold it in while using the pedal to pump the difficult one out. Then piston pliers to wriggle the other out.
If the seals on the master cylinder haven’t been replaced recently I’d change ‘em. Yamaha say to do so every 4 years for all the hydraulics’ rubber components, though that is a bit over-cautious.
You can avoid problems with bleed nipples by greasing the threads when you put them in. And a squirt of WD40 down the hole after bleeding blows out that nasty hygroscopic brake fluid... just keep your face out of the firing line when you do.

Good tips thanks. Think I will invest in a pair of piston pliers. No rain or salt in 19 years . Which seals is it in the master cylinder I cant tell in the fowlers exploded diagram.
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Fowlers Item 6, the “Cylinder Kit, Master” is what I’ve bought in the past. It does include more than strictly needed, but I don’t think you can get the individual rubber parts separately.
As you probably know, getting air out of the back brake is a pain because the path the fluid fluid takes goes up and down. Air trapped in the master cylinder is best removed by slackening the banjo at the top.