'91 CBR 1000F Front Brakes
#1
05-25-2009, 02:11 PM
'91 CBR 1000F Front Brakes
Hi all. I just got my forks back from the shop. Everything was going fast and steady; forks back in, bars, wheel, calipers, new pads...... bang bang bang no snags. Knew it was going to well.
I am having a fit bleeding the air out of my front brake lines. I've done this many times before on cars, trucks, dirt bikes, quads, ect and have never had trouble. Everything is checking out (bleeder open, no leaks, ect.) I just keep pullin and pullin on the lever to bleed 'em and I'm getting no where fast. Am I missing something? Or do I gotta just keep pulling that lever. I have both lines open, should I shut one off 1st? They were completely dry.... problem? (can't immagine why...)
help!
I am having a fit bleeding the air out of my front brake lines. I've done this many times before on cars, trucks, dirt bikes, quads, ect and have never had trouble. Everything is checking out (bleeder open, no leaks, ect.) I just keep pullin and pullin on the lever to bleed 'em and I'm getting no where fast. Am I missing something? Or do I gotta just keep pulling that lever. I have both lines open, should I shut one off 1st? They were completely dry.... problem? (can't immagine why...)
help!
#2
05-25-2009, 03:14 PM
Hi Michael , recently changed front pads and cleaned up the callipers myself .
Do one side at a time , pump like crazy with the bleed nipple closed to build up a little pressure then release the nipple just enough to relieve a bit of the pressure . It took me ages 'cos I think I was opening the nipple too wide and allowing a bit of air in the system , went through nearly two bottles of brake fluid untill I figured what was happening. Eventually it will run clear! Mine are well and truly flushed through now though!
Do one side at a time , pump like crazy with the bleed nipple closed to build up a little pressure then release the nipple just enough to relieve a bit of the pressure . It took me ages 'cos I think I was opening the nipple too wide and allowing a bit of air in the system , went through nearly two bottles of brake fluid untill I figured what was happening. Eventually it will run clear! Mine are well and truly flushed through now though!
#3
05-25-2009, 05:19 PM
#4
05-25-2009, 05:54 PM
Maybe because they were completely empty it may take longer to pump through . I was there for about an hour , it was coming through , just not clear of air bubbles.
Definitely do one side at a time , if it's not going through with the nipples closed then pump it with one nipple open (may be better) , then if it comes through , shut it off and do the same on the other side. If it's all empty , there may be too much air in there to build up pressure using the first method.
Definitely do one side at a time , if it's not going through with the nipples closed then pump it with one nipple open (may be better) , then if it comes through , shut it off and do the same on the other side. If it's all empty , there may be too much air in there to build up pressure using the first method.
#5
05-25-2009, 06:47 PM
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If you keep the nipple/s open it will suck air in and out, it will never bleed. You can do it like Hawk said (puming it while closed, then holding the lever and opening the bleeder nipple) There will be lot of pressrue with this method so have a rag over the nipple or put a vacuum line over the ne dof the nipple/ bleedign screw and let it collect in a something like a Pepsi can. OR you can do it the slow way and open the nipples and WAIT. Gravity will pull the fluid down but it will take time.
#6
05-26-2009, 06:34 PM
#7
05-26-2009, 07:01 PM
Administrator - Retired
#8
05-27-2009, 12:23 AM
There are some tricks you can use
1 Pull the brake lever and tie it back to the grip. Fill master cylinder and leave overnight.This will help to fill the cyclinders at the wheels
2 The front has two brake hoses - if you clamp one shut (not too tight just so fluid won't flow) and work on the other one, it's like doing the rear.
If you don't clamp one hose the air will run back and forth and drive you mad.
Don't forget cars usually only have one brake line to a wheel, bikes have two in front, and they're linked.
1 Pull the brake lever and tie it back to the grip. Fill master cylinder and leave overnight.This will help to fill the cyclinders at the wheels
2 The front has two brake hoses - if you clamp one shut (not too tight just so fluid won't flow) and work on the other one, it's like doing the rear.
If you don't clamp one hose the air will run back and forth and drive you mad.
Don't forget cars usually only have one brake line to a wheel, bikes have two in front, and they're linked.
Last edited by Shadow; 05-27-2009 at 12:26 AM.
#9
05-27-2009, 12:59 AM
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Posts: n/a
Michael Parks
Are you sure you are not "Then Came Bronson" and are just use to a Harley Sportster (Misspelled your name Michael)? I liked that show Mr. Parks....
http://www.youtube.com/watch?v=JTf3T...eature=related
Use a brake bleeder kit from an auto store. Basically, it is a pepsi can (like above) with a clear hose to the bottom of the can. Put a small about of fluid in the can, pump your front brake lever - hold handle, open bleed valve nipple. Air can not get back up so the air will now start to all come out.
I use to not use these simple kits, but I am feeling much better now! If all else fails and you are still having problems, back bleed it with a syringe that you can get at a auto parts store or a pet supply store. Put that clear tubing on it and fill the syringe. Hook the clear tube to the nipple (do like a nurse and get the air out of the tube/needle before you push fluid up into the vein!) and push the fluid in backwards (air bubble do go up don't they?).... Close the nipple, refill the syringe, hook the tube back up, open the nipple and do it again. Just make sure you do not push so much up that you overfill the master cylinder and run brake fluid all over your bike. It does eat paint!.....
When you get that puppy running go out and have fun - here is a way to have fun http://www.youtube.com/watch?v=FSJuB018jy4
http://www.youtube.com/watch?v=JTf3T...eature=related
Use a brake bleeder kit from an auto store. Basically, it is a pepsi can (like above) with a clear hose to the bottom of the can. Put a small about of fluid in the can, pump your front brake lever - hold handle, open bleed valve nipple. Air can not get back up so the air will now start to all come out.
I use to not use these simple kits, but I am feeling much better now! If all else fails and you are still having problems, back bleed it with a syringe that you can get at a auto parts store or a pet supply store. Put that clear tubing on it and fill the syringe. Hook the clear tube to the nipple (do like a nurse and get the air out of the tube/needle before you push fluid up into the vein!) and push the fluid in backwards (air bubble do go up don't they?).... Close the nipple, refill the syringe, hook the tube back up, open the nipple and do it again. Just make sure you do not push so much up that you overfill the master cylinder and run brake fluid all over your bike. It does eat paint!.....
When you get that puppy running go out and have fun - here is a way to have fun http://www.youtube.com/watch?v=FSJuB018jy4
Last edited by CBRriderNevada; 05-27-2009 at 01:20 AM. Reason: my little voice said to edit or was that eat it?
#10
05-27-2009, 01:16 AM