Question about 2005 Honda CRF 250 R

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Can not blled front brake

I have tried to bleed the front brake on my CRF250R but with no sucess, I untightened the nipple on the Caliper connected a bleeding tube and then undone the cap on the handle bars and pumped the brake to push all old fluid out but the old fluid did not come out of the top reservoir also when the nipple is retightened and the brake is pressed there is no build up of pressure.

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  • jwellison67 May 11, 2010

    You may have to repair the reservoir. It sounds like the plunger assembly needs new seals.

  • Anonymous Mar 26, 2014

    brake fluid bleeding sequence

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I find that vacume pump are affective on bleeding all hydrilac systems.

Posted on May 22, 2014

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Hi m8,,was the brake workin b4,,can i just run threw the bleeding process wid you,,fill up the reservoir, just place the cap bk on without screw it down,,pullin in the brake lever,holding it in, undo the nipple on the caliper,,,till air seeps out,, do up nipple ,,release lever,keep repeating this till pure fluid seeps out wen nipple has been slackened,,,or simple way piece of tube on the nipple and dip the other end in2 some old fluid in a jar,undo nipple and pump the lever,,till all the air is out,, the tube must stay dipped in to the fluid,, keep toppin up the new stuff in the reservoir,.if nothing still then u need a seal kit in the plundger of the lever,,cheers,

Posted on Jan 21, 2009

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My sportster did the same thing. I took off the master cylinder, drained out the old fluid, sprayed it with degreaser (but didnt pump it through cuz that isnt good for rubber parts), and used a tiney piece of wire to clean around the tiney hole in the bottom. When I put it back on it worked fine.

Posted on Jan 21, 2009

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Attach bleeder tube to nipple place open end in bottle Open reservoir fill with proper fluid
With nipple closed squeeze brake handle then open nipple
Close nipple before releasing brake
Repeat until no air comes out and breaks feel good
Without a power bleeder this will take some time

Posted on Jan 21, 2009

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1 Answer

Dossen want to bleed


Hi there.im guessing your still battling with a rear brake caliper..1st un bolt and take the capliper off the disc ..2nd.fill the resevior up with fluid.leave the cap off the filler pot..3rd pump the rear brake pedal a couple times till u see the pistons in the caliper move..place a bit of wood in between the brake pads to stop the pistons popping out..pump the lever again a few times..if the caliper is to tight to put back on the disc..(not recommended) but prize the pistons appart with a spanner or flat screw driver..place the caliper bk on.top up fluid .put the filler cap bk on...to proper bleed it.take a 8 or 10 mill spanner.place on the caliper bleed nipple..place a rubber tube to the nipple.and drop the end into a jam jar with a little bit of fluid in .dip the end of the rubber tube into the fluid. .push down on the brake lever.and hold it down..whilst holding down the lever.undo the bleed nipple.u should see air bubbles come out in the jar of fluid..tighten the nipple back up.and release the lever..repeat the process till all theair bubbles have gone..fill up the filler pot.

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Your rear brake pedal operates the rear caliper and the front disc. When you tried to bleed the left front caliper you let air into the rear brake system. Bleed the rear brake and front left caliper using the rear brake pedal that should restore the rear (and front) brakes.

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DO NOT PUT GREASE IN THESE!

They are positioned at the top of the brake caliper as that is where the air in the caliper will end up. If you don't know how to bleed brakes, do not touch them.

I'm sure you can read about how to bleed brakes in most Haynes/Clymer type manuals, it takes time and patience. It maybe best to get a mate who knows what they're doing to help/show you the first time.

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break loose the bleed nipple on the caliper. Open the reservoir at the brake lever and fill with fluid. Keep it open as it has a very small capacity and you will be re-filling it as you go along. Wait and see if it will gravity bleed out. If not, pull the brake lever and put your finger over the bleed when you release the lever- so it won't **** air back in. You should be able to feel the air bubbles "squish" out of the caliper. Continue till no air is left.

Tighten up the caliper nipple and fill the res to the top and your done.

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1 Answer

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hi, try lifting the caliper higher than the brake resivoir, as the fluid will then have to be pumped up hill and the chances of removing the air ar improved, do you have a bleed nipple at the rear mastercylinder, if so bleed it here first, does this bike have rubber rear brake line, if it does you can clamp the pipe close to the master cylinder with some grips useing a cloth wraped around the hose to reduce damage, with the pipe clamped the mastercylinder should be hard when depresing the pedal, if this is the case u can then force the fluid through to the rear caliper by opening the nipple on the caliper then using the on of pumping method using the grips, press down on the pedal with the grips released, dont let go of the pedal again until you have re clamped the hose again, keep repeating this untill all the air is removed and the fluid comes freely from the caliper bleed nipple, finish off with the grips completly removed and bleed as usual at the caliper, all the time not alowing the fluid level to drop low in the resivoir. hope this helps, paul

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I am having a problem bleeding the front brake with the standard method on a Yamaha XT 125, 2005 model, can anyone help?


I may need a bit more clarification, but I am assuming the lever is 'spongy'?
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3 Answers

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Mar 12, 2010 | 2001 Suzuki GSX-R 1000

2 Answers

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Try gravity bleeding. Open bleed nipple and wait for steady dripping. After closing nipple, the lever doesn't have pressure, the cylinder at the lever is defective. It's a go- no go thing. Either it works or it doesn't. good luck

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1 Answer

Brake pedal won't return.


There could be a couple reasons for this. First thing to check is your return spring, is it still there and attached properly? Next thing to check is your master cylinder pressure release. Loosen the bleed nipple on the rear caliper. Does the brake release now? If so, your master cylinder has some debris clogging the fluid return passageway. Remove and clean it. If the brake still does not release after opening the bleed nipple, at least one of your caliper pistons is binding. Remove the rear caliper and the brake pads. Now press the pedal and force the pistons out. Looses the bleed nipple and attempt to press the pistons back into place. They should move smoothly when you apply firm pressure. Clean the caliper thoroughly. If you have a rebuild kit for the caliper this is a good time to rebuild it. After cleaning, put it back together, bleed the brakes and test again. It is normal for disk brakes to drag SLIGHTLY on the rotor, but they should not stop a free spinning wheel in less than a coupld revolutions when spun by hand.

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