Braided lines

[Jrod]

Right I bought some goodridge lines, I have installed them and the rear is working fine. Now I'm trying to bleed the front but it just won't work. I open the nipple whilst squeezing the lever and close the nipple before it reaches the bar. I have done this for like 5 hours and nothing... Get a little bit of fluid everynow and then but nothing to make the brakes work.

Am I doing something wrong? Help

[Simonbt]

This may sound obvious but have you got the resovoir full and is the wheel, disk and pads attached? If it was a blockage in the pipe you would find the leaver would go stiff. it may be something in blocking the resovoir though?

[Guest]

Trouble replying?

[Ric]

mate if your not sure take the caliper off, jam the pistons so the pads are at their widest then make it so the nibbles facing up

should be fool proof aka works for me

[Guest]

Did it again


Be patient - if you try and rush it you'll just bubble air into the fluid and never get it right.

Leave the bleed nipples closed. Turn the bars to the left, this gets rid of that annoying air trap at the top hose connection. Top up the res and keep an eye on the level a ll the time, topping up as needed.

Very slowly and gently squeeze and release the lever - you'll see tiny air bubbles come up into the res. Give it a moment and do it again - more bubbles. keep doing this until there's no more bubbles coming back - go for a cuppa

Next time you squeeze you'll see a BFO bubble - the air's found it's way upwards while you've been having a brew. A few more squeeze/releases and the hoses will be full and no more bubbles - now the only air left is in the high part of the caliper.

Squeeze and hold the lever, barely crack open and immediately close the bleed nipple, release the lever. A few of these and you'll have fluid coming out of the nipple and your brakes will be back.

I've changed and bled hoses in half an hour just by taking my time and you only use a gnat's chuff of fluid as well

[Guest]

Hallebloodyluyah

[stinkwheel]

Another way is to suck the fluid down through the nipple using a syringe and a bit of tube attached to it instead of trying to pump it down.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Guest]

[G]

To add to what stinkwheel mentioned; plenty of people pump fluid up through the bleed nipple with a syringe to get over air-lock problems.

[Jrod]

Tried all this, Had Yams round and we STILL couldn't do it.
We managed to get it working if we just attached one line but when we put 2 on it did nothing. You get fluid coming through the nipple and air bubbles but they just KEEP coming. WTF?

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[Scooby]

Have you cracked the banjo bolts too? There are probably air locks at these which are very difficult to get rid of just using the bleed nipple. Best bet is to get 2 people. The first person pumps the piston in at the lever (lever removed so you can pump it properly, not just the amount of travel the lever is willing to allow you) and to keep the master cylinder topped up. The second person has a bleed kit set up on the nipple, and taps the line whilst the first person is pumping. Then crack the nipple. Then repeat but crack the banjo. Repeat until you get some feedback from the piston, some resistance building up. You may need to crack the banjo at the master cylinder too.

The key to bleeding brakes is having the right tools and not rushing it. Once you've got them near as damn it, re-attach the brake lever and tie it back to the bars with the master cylinder cover left off over night, to get rid of the tiny amount of air still in the line.

This is all the information you need. I presume your bike isn't a dodgy import or anything like that, that has 2 bleed nipples on one caliper too. That's been known before and found an hour into brake bleeding
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A big enough hammer fixes anything!

[Jrod]

It's a import but only has one bleed nipple. So I need to crack the banjo bolts on the caliper?

[Scooby]

Yes, pump the system up then quickly crack on, you will here it splurt out a load of air, you will see what I mean when you do it. Hope this helps
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A big enough hammer fixes anything!

[Jrod]

I really cba to do it now, I must of spent 4 hours doing it today with no luck.

[Sparks!]

It was weird, as we got one side working, but with both lines on, and particularily the left caliper, it was NOT having it.. I bled that right line within minutes that first time?!

I 100% think the problems with your master cylinder as I reckon there is an air leak.

I wouldn't completely trust those lines either as they were hand made up by a non-professional.

Also I think you should stick the ORIGINAL banjo bolts on to see if that makes any difference?
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Current Toys: 06 Yamaha WR250F | Nissan 350Z GT | Tech 4 Homes

[Scooby]

Ahhh, the story is unfolding here. You might have a worn piston in the master cylinder. That is not uncommon. The lines themselves should be fine, if they're leaking, you'd probably know about it, and you don't need to be a genius to make up brake lines. The banjo bolts could also be the problem too. I'm afraid it's going to be a trial and error job mate. We had a ZZR600 in not long back with a worn piston seal in the master cylinder, let's just say it was cheaper to get a second hand master cylinder
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A big enough hammer fixes anything!

[Sparks!]

[Jrod]

ARGH, I can't afford this now If you put your finger over the hole on the top and pump the lever fluid does come through (with force) but when you let go it sucks air in, next time you push the lever it just pumps that air out. should it suck air in or has a seal gone or soemthing ?

[Sparks!]

I reckon you're going to need a complete new master cylinder + res before the brakes will work again
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Current Toys: 06 Yamaha WR250F | Nissan 350Z GT | Tech 4 Homes

[Jrod]

[Jrod]

complete new master cylinder + res

Free is a good price
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[Guest]

[Jrod]

Well we tried to do them both at the same time but it didnt work at all, then we tried to do just one to see if anything was broken. That worked but then we tried both againand nothing Now I can't even get just one to work.
I think It needs a pro.

Anyone wanna come do it?

[Scooby]

I would happily do it for you, but you're way doon sooth ain't ya. Bloody foreigners
____________________
A big enough hammer fixes anything!

[Sparks!]