Brake system problems

Aaargh. It's just not happening for me. I've pulled the CB's front brakes
apart and had a nice inspection, and bled it until I can bleed no more
(literally), and it's still soft. But I've got pressure through the system,
just not enough.

So, here's a question - has anyone ever seen a pressure gauge suitable for
testing a bike's brake system, and (assuming such a beastie exists) what
sort of pressure I'd be looking at getting? My plan is to run through the
whole system with this pressure tester trying to work out whether it's the
master cylinder not playing well, or what.

- Matt

 

Get a big cable-tie and zip your brake lever in to the 'bar and then leave it overnight.

 

Can't help with the brakes but run down to Pirtek in Unanderra and ask them
nicely to hook up a gauge for you. They did a similar thing for me with a
problem I was having with my boat (needed to test the pressure of the
cooling water to see if the pump was OK without dropping the gearbox).
They are a pretty good crowd in my experience.

--James
ZZR250==>ZX9R
__________________________________
A random quote of nothing:

Hello. Jim Rockford's machine, this is Larry Doheny's machine. Will you
please have your master call my master at his convenience? Thank you.
Thank you. Thank you. Thank you. Thank you. Thank you.
-- "The Rockford Files"

 

You might also want to try bleeding the system from the master cylinder
bango bolt or the junction split a couple of times before you move onto the caliper nipples.

 

the caliper nipples.


Or you could just run the bike with no front pads or brake fluid (Police
Camera Action last night)---disc completely rustcoated when the Pommy
coppers pulled him over,so it'd obviously been without front brakes for some
time...


Postman Pat The Dastardly Scoundrel

 

"Matt Palmer" wrote

A couple of suggestions.
Check in the master cylinder to make sure the piston returns far
enough to uncover the tiny feed hole from the reservoir and that it's
not blocked. If this is the problem you can't bleed the brakes as
fluid will not flow through the system.

I reverse bleed my brakes using a 60 ml syringe and a plastic hose to
pump brake fluid into the system from the slave cylinder bleed screw.
Air travels up the line much better than it flows down. Make sure you
don't overflow the master cylinder reservoir.

Theo