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Old 11-02-2009, 07:50 PM   #1
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Front brake lever is soft

Whats up everyone....I have a 06 zx636 and the front brake lever is real soft. I got one of the pump brake bleeders and it did the job and it back to being firm again. The brake pads are more then half way and there are no leaks that I can see. Anyone have anything that can send me in a direction other then looking at it and getting mad that I can't enjoy this great weather.
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Old 11-02-2009, 07:52 PM   #2
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Change the Brake Fluid again or Bleed the system.
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Old 11-02-2009, 07:54 PM   #3
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Bleed it by hand. Tap on the master cylinder then bleed it. Then tap on the calipers and bleed them. Then tap on the lines and bleed the master one last time.
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Old 11-02-2009, 07:54 PM   #4
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A soft lever w no leaks:

air in the system(compressed when applying pressure) or the master cylinder leaking across the seal(internal.)
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Old 11-02-2009, 07:55 PM   #5
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^^^
what he said. I would also check the bleeder valve and see if its stripped or anything. Those little bolts are very sensitive and cannot be over tightened.
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Old 11-02-2009, 07:57 PM   #6
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Quote:
Originally Posted by maxgs View Post
Bleed it by hand. Tap on the master cylinder then bleed it. Then tap on the calipers and bleed them. Then tap on the lines and bleed the master one last time.
Like a pattern. tap tap beed tap tap bleed LOL
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Old 11-02-2009, 08:00 PM   #7
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So the pump is not as good as doing it by hand?
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Old 11-02-2009, 08:01 PM   #8
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brakes fluid brakes down over time, it is so hydroscopic that it will pull water through rubber lines over time. here is an article I wrote a few years back, its shot and to the point but its still good info to have. there is one mistake in it, find it and Ill flush your brakes for free, it should not be to hard to find.
http://falserivermotorsports.com/tech.htm

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Old 11-02-2009, 08:04 PM   #9
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I've always done it manually but it takes a little more precision and detail to the brake system on that bike to get it perfect. A vacuum bleeder makes it alot easier for peeps that arent familiar w constant practice.
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Old 11-02-2009, 08:05 PM   #10
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Quote:
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So the pump is not as good as doing it by hand?
I use a pump only when needing to remove a lot of fluid. All final bleeds, I do by hand.
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Old 11-02-2009, 08:10 PM   #11
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DOT 5, DOT 4 and DOT 5?
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Old 11-02-2009, 08:11 PM   #12
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'04-'07 ZX6 master cylinders are notorious for allowing air to get past the cylinder over time. Eventually you'll need to either rebuild or replace it.

FWIW, most of the time the rebuild does not last.
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Old 11-02-2009, 08:12 PM   #13
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I got you. I am going to try to bleed it by hand. The fluid that I got out of it was really dark. I used dot 4 fluid to replace the old. I will try by hand and do the tap tap bleed method. Thanks!!!!
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Old 11-11-2009, 10:43 PM   #14
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Quote:
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'04-'07 ZX6 master cylinders are notorious for allowing air to get past the cylinder over time. Eventually you'll need to either rebuild or replace it.

FWIW, most of the time the rebuild does not last.
yep, these break blow.
find a zx14 calipers thats parting out and pick it up from them... along with some braded lines

07-08 zx6r use the same nissin front calipers as the zx14
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Old 11-11-2009, 10:59 PM   #15
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oh yeah you will need the 07-08 lines. ours are too long
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Old 11-16-2009, 03:50 PM   #16
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So the zx14 brake set up is the same as a 06 636?
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Old 11-16-2009, 03:58 PM   #17
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Quote:
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Like a pattern. tap tap beed tap tap bleed LOL
Thats what she said!
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Old 11-16-2009, 04:02 PM   #18
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DOT 5, DOT 4 and DOT 5?
That's what I got too... so when is he coming over to flush our brakes?
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Old 11-17-2009, 05:43 PM   #19
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So the zx14 brake set up is the same as a 06 636?
it will bolt up the same. better set up though.


i also hear that about about people putting on the zx-10 breaks, not sure if they are doing the whole set up or not though. not sure about the years either....
i do know of a few people that just leave the lower half of the break set up and change out everything up top. story is that our resivor lets air in the lines...

also braided lines will help a lot too.


my funds have been low for awhile now so i havn't been able to do it to my bike but ive done the work on others. pretty easy stuff
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Last edited by K UU G; 11-17-2009 at 05:48 PM. Reason: fix
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Old 11-17-2009, 05:46 PM   #20
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The biggest issue is the master cylinder, the calipers aren't much of an issue in my experience.
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