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Old 06-24-2008, 07:26 PM   #1
ar1300
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rebulit the master cylinder. added ss brake lines. also bleed the brakes. i seem to have no brake pressure. fluid flows from the resovior. fluid also flows out the bleeder when loose. also cleaned all dust from the pistons. but the pistons dont move. cant build pressure. can anybody help me out. what im i doing wrong.
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Old 06-24-2008, 07:33 PM   #2
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keep bleeding them, you may have to do it 20 times, 1FC
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Old 06-24-2008, 07:46 PM   #3
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One guy told me to ty wrap the brake lever back and leave it that way overnite.Allows all the air to escape
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Old 06-24-2008, 07:47 PM   #4
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Quote:
Originally Posted by ar1300 View Post
rebulit the master cylinder. added ss brake lines. also bleed the brakes. i seem to have no brake pressure. fluid flows from the resovior. fluid also flows out the bleeder when loose. also cleaned all dust from the pistons. but the pistons dont move. cant build pressure. can anybody help me out. what im i doing wrong.
Take it out on the highway and around town for a bit... that usually gets em workin' again. After 30-45 minutes, they'll feel normal again. I don't know if it's the vibrations and bumps or what.
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Old 06-24-2008, 07:50 PM   #5
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muahahahaha
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Old 06-24-2008, 07:50 PM   #6
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I wouldnt ride if you dont have a front brake!!


1fastchevy is right, gotta keep bleeding. It can take forever but you gotta be able to build pressure.
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Old 06-24-2008, 07:51 PM   #7
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muahahahaha
Dude that aint funny.
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Old 06-24-2008, 08:22 PM   #8
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the problem may run deeper then just bleeding the brake lines. did you collapse the pistons?
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Old 06-24-2008, 08:26 PM   #9
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are you using a brake bleeding tool or just doing it the old fashioned way? might take it several tries if not using a bleeder tool....av8 r22...stfu! this isn't a off topic thread... post useful info to someone who needs it or out.
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Old 06-24-2008, 08:29 PM   #10
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Old 06-24-2008, 08:29 PM   #11
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Try one of those vacuum bleeders, I here they do a really good job.
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Old 06-24-2008, 08:30 PM   #12
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Question... is your bike lowered or did you put an aftermarket upper tree that relocated the master cylinder to a different location? If so, usually the pitch of the master cylinder reservoir is at the opposing angle to what it should be in order to bleed the brakes. When mine get low I need to turn the rack to the left, lean bike to the left and pump the brakes to get the bubbles out. You need to overfill the reservoir if it is pitched.

Other then that, assuming the mastercylinder isn't leaking back the pressure through the seals sounds like there is still fluid in the system. Dot 4 correct?

Run a hose from the brake bleeder screw to and into a clear container half filled with fluid. submerge the tube into the fluid. Crack the screw just a little and start pumping. This will allow fluid to get sucked up instead of air if timing is off while pumping and cracking the bleeder screw. You will be able to see the bubbles come out. If you suspect bubbles trapped in joints, you can wrap a rag around the banjo bolts and crack them underpressure momentarily.
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Old 06-24-2008, 08:34 PM   #13
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Use a vacuum bleeder. I have tried multiple times on bikes doing the gravity bleed and the mityvac makes it so much quicker and easier
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Old 06-24-2008, 08:39 PM   #14
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Old 06-24-2008, 10:17 PM   #15
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thanks for the replies. i used a hose on the bleeder with a container. it took a few tries but i got it. just a pain to do. but i got it now. thanks.
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Old 06-24-2008, 10:30 PM   #16
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Your forearm triple the size of the other now with that work out?
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