Binding Brakes

Hi All,

I've got a bit of an issue with the Divvie, The front brakes are binding
a bit. Now I've stripped down and cleaned both sets of Callipers,
Replaced the pistons, replaced all the seals, put new pads in, polished
the sliders, got rid of all the crap off every surface, and they are
still binding a bit. Any suggestions (Other than buy new complete
calipers, They're £200 a side!!!!)

Thanks
John

 

John Kendall emerged from their own little world to say

shit in the master cylinder return valve

 

Piss in the reservoir.

 

<All together now>

Do you think that'll help?

 

Well it's quite cold out, so I haven't tried it yet......


John

 

In uk.rec.motorcycles, Pip amazed us all with this pearl of wisdom:

Spunk on the plunger.

 

Might not be relevant , but my (1982) brakes were binding, not
suddenly but eventually they locked up entirely.

Everything cleaned(x3) or replaced but I missed a <1mm hole in
the piston assembly that released the pressure after braking.

All safe now.

 

does it have slide pins? I found that on my bindit the slide pins had
worn ever so slightly and a small edge was stopping the pads from
returning smoothly.

--
Martin:
"For a minute there, you bored me to death."
VTR1000 Firestorm
TDR250 http://ukrm.net/BIKES/Yamaha/tdr250.html
martin dot smith nine zero three at ntlworld dot com

 

and they are

Jon,

You have to be really scrupulous getting the muck out of the groove the
piston seal sits in. You get a build up of muck that pushes the seal out -
by less than 1mm - but in many different spots. This is enough to make the
seal "grab" the piston and stop it returning properly. A big clue is that
the piston is difficult to push back in when you think you've cleaned it.

A Dremel with it's small wire brush is excellent, as well as a small bradawl
to scrape the stuff out, as it can be pretty solid.

Stu