Cleaned brakes + dot 4 fluid change = Brakes not working xt1

[WherEmEweeD]

Hi

I just removed my brake and cleaned it up took pads out etc and drained the old dot 4.

Now i have pumped new dot 4 and there is no brake action just a limp brake lever with no resistance and brakes which don't work

This is the front brakes i have not got to the back brake.
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Yamaha XT125 x '07 (Swapped)
Honda NSR 125 '00 (Sold)
Peugeot Sum-Up 125cc

[P.]

You have undone the bleed nipple, put a tube on the end, put into a pot of old brake fluid and pumped till all the air came out, tightened the bleed nipple and pumped the brakes?

[doggone]

Air in it somewhere, it might work out left overnight but most likely needs more bleeding.
They can be right sods and need doing from the bleed screw upwards with a hypodermic and bit of pipe shoved on.

[WherEmEweeD]

Gonna leave overnight to fill brake drums with fluid then tomorrow will do more bleeding from the nips.

I have a mate helping me. Was wondering is it neccessary to use a hose from nip to container with fluid as i can't find a hose the right size for the job will probably have to purchase one.
____________________
Yamaha XT125 x '07 (Swapped)
Honda NSR 125 '00 (Sold)
Peugeot Sum-Up 125cc

[steady eddie]

yeah, you need a good fitting hose (battery breather hose often fits nice) over the bleed nipples then just do what he says below

[Noxious89123]

[Blue_SV650S]

One of these should see you right https://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_204703_langId_-1_categoryId_255216.

It isn't too expensive, really simplifies the job and gets you 100% working brakes. It has a 1-way valve in the pipe, so you can just leave the bleed nipple open and pump at the leaver until there is no more air coming out - filling at master cylinder obviously!

If you have an airlock in the master cylinder, it can be a bit of a pain to get things flowing. The best tip here is to 'bottom fill' this is where you try and force fuel UP the system, hence forcing the air up and out the master cylinder - which is more natural direction for air to flow! A syringe full of brake fluid connected to the open nipple via a bit of pipe is how you do it.

An alternative is to take the calliper off and push the pistons in, this effectively does the same thing of forcing fluid and air up the system (assuming you have enough fluid in the calliper to start with!).
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The purpose of life is to fight maturity.

[WherEmEweeD]

[Fisty]

try bleeding the banjo bolt at the master cylinder.
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Quietly and consistently taking the piss.
TL1000R | Hayabusa | ZXR400 | TL1000S | Bandit 400 V
Fatter and faster than Fret

[Blue_SV650S]

[Dave-the-rave]

There's a really simple way to do all that without syringes or removing bolts etc. Open bleed nipple and suck on the tube, obviously without getting brake fluid in the gob.

When enough is through then bleed as normal.

Disclaimer to small children and idiots...Don't try this at home.

[WherEmEweeD]

Happy days shes back online! after much back pain and patience

Used most methods posted but in the end it was sucking the pipe that scored the goal.

Atleast now i'm well educated for bleeding the rear brakes lol

MOT will be soon coming

Thanks for all the advice
____________________
Yamaha XT125 x '07 (Swapped)
Honda NSR 125 '00 (Sold)
Peugeot Sum-Up 125cc

[Robby]

I've just seen this, there's a much easier way.

The most useful tool for bleeding brakes is time and patience.

Bleeding at the nipple is always the last thing I do, and that's just to remove a tiny air bubble. The cavity under the bleed nipple it tiny, and holds a miniscule amount of air. Most of the air will be in the caliper and line(s), and it will naturally rise up to the top of the line over a short period of time.

Leave the bleed nipple closed and just operate the brake lever using full, slowish strokes. This lets the air up into the master cylinder, and lets the fluid down to replace it. When no more bubbles are coming up into the master cylinder, open the bleed nipple to bleed off the little bit of air in the caliper.

Doing this with the pistons pushed in makes it easier - less space for air to accumulate in the caliper.

[Dave-the-rave]