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post #1 of 17 Old 04-23-2016, 02:14 PM Thread Starter
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brake system

yesterday i went out and brought a vacuum bleeder to bleed the brakes. It will be a stiff brake the go soft. i changed the calipers. the brakes pads are new.i have been bleeding these brakes for the last 2hrs. I need HELP please.
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post #2 of 17 Old 04-23-2016, 03:17 PM
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Zip-tie your brake lever down overnight. This usually will let the air bubbles escape through the reservoir.
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post #3 of 17 Old 04-23-2016, 03:28 PM
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Zip-tie your brake lever down overnight. This usually will let the air bubbles escape through the reservoir.
Agreed.

I hate stupid people.
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post #4 of 17 Old 04-23-2016, 03:30 PM Thread Starter
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do you think its the master cylinder is bad.
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post #5 of 17 Old 04-23-2016, 03:59 PM
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It could be. Try the zip-tie method. If you get a nice stiff lever and then it fades away back into mush I would guess that the master needs a rebuild. I might have a good master for a zx9 I would have to look though.
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post #6 of 17 Old 04-23-2016, 06:31 PM Thread Starter
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So just take the cap off and zip tie the lever and that's it till the morning
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post #7 of 17 Old 04-23-2016, 06:32 PM
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Originally Posted by antman25 View Post
So just take the cap off and zip tie the lever and that's it till the morning
I have never had to even remove the cap.

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post #8 of 17 Old 04-23-2016, 06:37 PM Thread Starter
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ok thx
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post #9 of 17 Old 04-23-2016, 11:54 PM
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yep try the zip tie method I do mine on my 12 every few months just out of habit Craig

if anything goes wrong check the battery
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post #10 of 17 Old 04-24-2016, 06:29 AM
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Tap calipers with rubberr mallet to help air trapped come to the top....be patinet it takes time

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post #11 of 17 Old 04-25-2016, 01:06 PM Thread Starter
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So I got up this morning to ride to work and as I was riding the brake went soft so
I guess it is the master cylinder
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post #12 of 17 Old 04-27-2016, 01:14 PM Thread Starter
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so today i rebuilt my master cylinder and Im still getting a soft brake when im riding. its hard after bleeding then soft before i make it out the driveway
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post #13 of 17 Old 04-27-2016, 03:57 PM
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If you stop and pump it does the lever return? Sounds like warped rotors.
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post #14 of 17 Old 04-28-2016, 11:47 AM Thread Starter
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Yes it does come back
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post #15 of 17 Old 08-04-2016, 08:42 AM
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I read your other post before this one so disregard that answer as I'm now going with the magician above as I had the exact same thing happen to me before and its actually the carriers that get warped rather than the rotors themselves, it pays to clean up the disc bobbins every few months to stop them seizing which causes this.
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