Brake Bleeding

[MacD]

First pump the lever a couple of times, then hold the lever in...crack the banjo bolt thing up by the reservoir (where the rubber brake lines go from), let the air rush out...tighten the bolt. Then pump the lever, hold it in, open the banjo bolt letting air rush out. Close the bolt, release lever, etc.

It worked well for me, yours might be a different problem but hey it might be worth a try.

Cracking the banjo bolt open is a good idea if you can't get all the air out through the normal method. Just watch out for the brake fluid squirting out under pressure when you do it! Brake fluid does nasty things to paint and some plastics!

[saiko]

Thanks for that, I think I'm releasing the handle whilst the bleed valve is open.

[BNZ]

Thanks for that, I think I'm releasing the handle whilst the bleed valve is open.

Bugger, sucking air straight back in!

[Coyote]

But I just cracked open the top nut where the special bleed valve thing mentioned in the thread would go and it bled perfectly.

It was that easy for 1 of our dirt bikes, but not so with the CBR

There is an airlock inside the piston. You need to remove the hose at the top and allow fluid to move thru the piston.

I'll give that a go later tonight

[limmy]

i had the same problem this weekend except that we didn't know what the heck was happening. ended up spending about an hour pumping the brakes and the air bubble finally came up and then it took like 5 minutes to bleed the fluid.

because i had a bubble in my lines my brakes also weren't working properly and everytime i brake it should shudder. before i bleed the brakes i had no idea this was causing it. i actually thought i had a bent rotor.

[FEINT]

if you keep pumping and nothing is happening, there is probably still an air bubble in the hosing. You can either keep pumping it or open the banjo bolt at the top (near the master cylinder to let the bubble rise right to the top and out) - was reading from Wildcats post.

Then close the banjo bolt and keep pumping until there is only continuous brake fluid coming out of the breather nipple on the caliper. Do one side at a time. Once there is no air in the system, it should flow out like a vacuum.

Then as some have mentioned, depress the brake lever and close the breather nipple. Then pump a few times and HOLD, open the breather nipple and close.

Tried this out on Limmy's bike it works now!