In your message dated: Tue, 08 May 2001 11:59:37 +1000,
The pithy ruminations from Rob Chapman on
<Air in rear brake> were:
=> Met a Yamaha service manager on my recent trip. He service 1 GTS in
=> Brisbane, but said that every time he serviced it, there was air in the rear
=> system, but with no loss of fluid..and he re-bled it.
=> I think there was a thread on this air entry, but can't remember the fix, if
=> there was one.
=> Can anyone help, please?
I've had that problem. About every 3500~5000 miles I have to bleed the rear
brake. I've had the seals & master cylinder replaced under warranty (at about
10k miles). At this point (turned 50k last weekend) I just bleed the brake as
needed. With SpeedBleeders it's quick, easy, and fairly painless.
I just bought rear brake pads, caliper seals, dust seals, and new pins. I've
got to change pads, so I figured it was a good time to do a minor re-build.
I've noticed that the caliper isn't centered on the disk--the inner pad is worn
more than the outer. I suspect that the seals are sticking and preventing the
pads from moving close to the disk as they wear. That means that when you
activate the brake, you've got to pump a lot of fluid to move the pads before
they reach the disk (in this case "a lot" is relative...it's a couple of CCs at
most).
That would be consistent with what I find when I bleed the brakes. I don't get
a great deal of air...sure, there's some, but not a lot, and it doesn't take a
long time to bleed the air out. The bleeding that I do is a little bit forcing
air out and a lot moving fluid around.
Mark
=> Regards,
=>
=> Rob Chapman
=>
