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Post Info TOPIC: bleeding front brake?????


DTR Senior Member

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bleeding front brake?????
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hi any one no how to bleed the front brake???the brembo dtx 1


-- Edited by dtrcruzer on Thursday 28th of May 2009 10:58:50 PM

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yam r6 2009



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Undo the cap on the nipple ?

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yea me and a mate dun that

we undun the bleeder valve pulled lever in closed bleeder valve let lever out dun that for about half hour and it didnt do anything

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yam r6 2009



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you need a length of tube and a pot with brake fluid in

you put one end of the tube on the bleed nipple and dip the other end in a pot of brake fluid (a jam jar is perfect for the job)

then squeeze the brake lever and open the bleed nipple you may see some air bubbles come through the tube along with the fluid

close the bleed nipple then let go of the brake lever and repeat the process untill the fluid runs smoothly i.e no air bubbles and the brake feels firm biggrin

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ok mate nice 1 il let you no how it goes tommorow

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yam r6 2009



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just make sure you keep the end of the tube dipped in the pot of fluid at all times so it dosnt suck air back in and you will be fine m8

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ok will do has it got to be perferct fit on the bleed valve?

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yam r6 2009



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pretty much m8, it needs to be a tight fit so it dosnt suck air in

if you go to the likes of b&q and look for tubing for pond pumps,its dead cheap about 50p a metre and its clear so you can see the fluid go through it

just get a size you can squeeze over the bleed nipple so it sits snug

-- Edited by bykerbaz on Thursday 28th of May 2009 11:35:17 PM

-- Edited by bykerbaz on Thursday 28th of May 2009 11:35:45 PM

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DTR Senior Member

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k i mite have some already in my house fingers crossed as i only have a rear brake atm lol

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yam r6 2009



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i have the pipe now how long do you reakon it should take to do?


-- Edited by dtrcruzer on Friday 29th of May 2009 04:46:27 PM

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yam r6 2009



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do i need the master cylinder for the dtx brake?

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yam r6 2009



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shouldent take too long m8 if your doing it right

any master cylinder should work ok if the pipes have been off and are dry it will take longer for the fluid to run through just keep pumping the lever untill it starts to come out the bleed nipple

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DTR Senior Member

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ok mate cheers hope i get it right this time its gettin well annoying:(
also do i need to take the cover of the master cylinder?

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yam r6 2009



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yes m8 leave the cover off as when the fluid level starts to drop you can top it up but dont let it run dry or it will suck in air and you will have to start again

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ok mate thats were iv been goin wrong then

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yam r6 2009



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found out it wernt nothing i was doing wrong the seals have gone in my master cylinder as it wount push fluid throug hopefully get it sorted tomoz

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yam r6 2009



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The only benefit of having the DTX cylinder is you get to use the Brembo lever with it . Dunno , some people live by Brembo . Also it's half the price of a DTR one . Useless info but F it lol

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DTR Senior Member

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Thought i'd tag onto this instead of starting a fresh.

I think i've got a problem. I'm bleeding my front brake as I have renewed the oil. I've had the caliper off for inspection, i had to push the pistons back with my thumbs to allow room for the new pads.

Everything is back on with fresh oil, but with the bleed nipple open no oil is coming out when I pump the front brake. I've got a tube attached to it going into a jar of oil but there is no pressure even with the nipple closed, and the pistons aren't being pushed forward for the pads to grip the disk?

I'm stumped??

Edit: Oh btw everthing was working fine before I decidied to fug about with it so I don't think it's the seals?



-- Edited by Spartan on Tuesday 11th of January 2011 06:09:25 PM

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DT125X 2007


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if youve put oil in it like you said you will probaly have ****ed the seals


hopefully uoi mean break fluid

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DTR Senior Member

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when i done mine it done this aswell though it will take i little while for it to start to come out it did on mine just kept on and finally it started to bleed properly

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yam r6 2009



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Yes Robin meant to say brake fluid, picked up some dot 4 today :)

Yeah it's weird, I've disconnected the brake line to the cylinder where the fluid is kept, now looks like this:

P1110294.JPG

It's half filled with fluid, but still when I pump the handle nothing comes out.



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DT125X 2007


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try blowing in the hole

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DTR Senior Member

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I'll give it a go, am I right in saying that even when like this fluid should still come out?

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DT125X 2007


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It should pour out, surely

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Yamaha DT125R - 2003



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Tried that now Robin, still no joy. Just been having another go at it, I honestly can't understand what's happened tho, all i've done is take the caliper off and drain the fluid, and I drained it before by pumping the handle and it came out no problem.

Yeah what I thought Craig.

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DT125X 2007


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Done it lads :)

Turned out that because I drained all the fluid there was no pressure. You were right dtrcruzer mate, just kept doing the bleed process over and over until finally the fluid started to pump through, yeah squeezing the handle alone doesn't get the fluid rolling, i've learnt that now. With the front done, changing the back pads and fluid was done in a jiffy!

Oh in case anyone is wondering, clear tubing can indeed be picked up from B&Q like Seiki suggested. I got a meter for £1.08, 5mm tubing fits perfectly around the bleed nipple and creates and tight seal.



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