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Old 09-30-2012, 05:06 AM   #1
YummyBurito
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Front brake applying itself...

So I layed my bike down about a month ago and in the process snapped the bleeder screw off of the MC. I bought a used one from ebay, OEM, and threw it on. I tried bleeding the system but it wasn't building pressure until i took the bleeder screw of the MC and funneled some brake fluid into the MC. I then put a hose on the left caliper bleeder screw and ran the hose into a bottle full of brand new brake fluid...i filled my reservoir to the top and cracked the bleeder screw and continuously pumped the lever until i saw no more bubbles coming out of the hose. I never let the fluid run out either!! closed and cleaned everything. Now I'm riding down the road brakes firm and solid working like a charm when all of a sudden my bike starts slowing down. I hit the clutch and the front brakes feel like they're fully applied but i wasn't touching them. BARELY made it to the side of the road...i had to call my buddy to bring a wrench so i could crack the bleeder on the MC. Went home bled them again using the same method as above. Went for a ride again. It's happened to me 4 times now in the last 48 hours. I now carry a rag and a 1/4" wrench with me. The level is right in between the min and max. Sometimes when I open the reservoir the diaphragm is completely sucked down idk if thats normal? I've read a bunch of forums and watched a bunch of different ways to bleed the system. I also thought there was still air in the lines and when the fluid heats up it causes the air to expand and applies the brake, just a theory. What i also find tricky is the amount of fluid to put into the reservoir before i place the diaphragm into.
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Old 09-30-2012, 06:12 AM   #2
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Re: Front brake applying itself...

did you replace the oem lever with a chinese lever off of ebay by any chance?
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Old 09-30-2012, 10:00 AM   #3
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Re: Front brake applying itself...

Quote:
Originally Posted by oldgixxer View Post
did you replace the oem lever with a chinese lever off of ebay by any chance?
Even with chinese levers, they should not be an issue.

Are your tubes kinked in any way?
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Old 09-30-2012, 10:06 AM   #4
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Re: Front brake applying itself...

Quote:
Originally Posted by JarvisB View Post
Even with chinese levers, they should not be an issue.

Are your tubes kinked in any way?
Is that so? Well then...



http://www.gixxer.com/forums/showthread.php?t=335453





Many many people have run into issues like this using cheap levers. There was one guy a couple of months ago, happened just like in the thread above. The manufacturer told him they were absolutly fine, but after a couple of weeks, he posted up with crash damage...I think you can figure all this out from here
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Old 09-30-2012, 12:06 PM   #5
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Re: Front brake applying itself...

Quote:
Originally Posted by JarvisB View Post
Even with chinese levers, they should not be an issue.
There absolutey is,you may not have heard of or experienced it but an issue does exist
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Old 09-30-2012, 12:37 PM   #6
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Re: Front brake applying itself...

Quote:
Originally Posted by JarvisB View Post
Even with chinese levers, they should not be an issue.

Are your tubes kinked in any way?

Wrong
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Old 10-01-2012, 12:41 AM   #7
YummyBurito
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Re: Front brake applying itself...

Quote:
Originally Posted by oldgixxer View Post
did you replace the oem lever with a chinese lever off of ebay by any chance?

http://luckybike.com/hand-and-foot-l...-suzuki-74-005
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Old 10-01-2012, 12:44 AM   #8
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Re: Front brake applying itself...

Quote:
Originally Posted by JarvisB View Post
Even with chinese levers, they should not be an issue.

Are your tubes kinked in any way?
tubes are not kinked.
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Old 10-01-2012, 12:47 AM   #9
Pee Wee Herman
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Re: Front brake applying itself...

Quote:
Originally Posted by YummyBurito View Post
There's your problem
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Old 10-01-2012, 03:22 AM   #10
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Re: Front brake applying itself...

I used the link minibull put up and went through a couple of those links and found this:

Quote:
Originally Posted by cheekymonkey View Post
Alrighty folks. I think I've figured this one out. On mine at least. I had an aftermarket brake lever on, which is when the problem started. I thought it might be a bad master cylinder but since it was fine before, I guessed it had to be something I did. Well, I had the old lever (OEM) on and it did the same thing. The curious thing was, when I set the adjuster so the lever was closest to the handlebar it would pull back all the way, but "bottom out" halfway to the handlebar. Normally the lever would practically touch the handlebar. I found out the hole on the lever where the m/c piston rod goes in has a small "roller" in the bottom. If you rotate that roller, you'll see another drilled out hole in it. The m/c piston rod end has to fit all the way into this hole to allow the m/c piston to FULLY extend and allow the brake fluid to return from the calipers. I haven't test ridden it yet, because of a thunderstorm, but I'll post the results by the end of today. Fingers crossed!!
Took my lever off an sure as S@#* the little hole where the MC plunger goes into was not where it was supposed to be...quick fix haven't had a chance to test it out since it just rained. ill keep you guys posted...
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Old 10-01-2012, 07:55 AM   #11
njyork42
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Re: Front brake applying itself...

You can put the plunger in the little hole and it will last a long while, but eventually that cheap chinese piece of junk will wear out and could lock up your front instantly and send you flying down the road..
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Old 10-01-2012, 08:04 AM   #12
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Re: Front brake applying itself...

Quote:
Originally Posted by njyork42 View Post
You can put the plunger in the little hole and it will last a long while, but eventually that cheap chinese piece of junk will wear out and could lock up your front instantly and send you flying down the road..
This.

Im not knocking the OP,but I still do not understand the allure of cheap chinese ebay stuff. Were talking saving a few dollars,at the (very real&proven)risk of sub-par quality&reliability which has been documented to cause accidents. Penny wise dollar foolish perhaps? The thrilln of modifying on the cheap? Modding bikes/cheap do not go hand in hand.... I dunno..
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Old 10-01-2012, 11:25 AM   #13
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Re: Front brake applying itself...

^^ + Juan ^^
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Old 10-01-2012, 12:02 PM   #14
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Some people won't learn until their cheap asses are skipping down the pavement on their fat wallet from all the dollars they saved

You know how crashes are slow motion sometimes... I can only imagine sliding down the road thinking "fuck... I shoulda listened about those damned levers!!! "
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Old 10-01-2012, 12:27 PM   #15
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Re: Front brake applying itself...

Quote:
Originally Posted by Moto_Joe View Post


Some people won't learn until their cheap asses are skipping down the pavement on their fat wallet from all the dollars they saved

You know how crashes are slow motion sometimes... I can only imagine sliding down the road thinking "fuck... I shoulda listened about those damned levers!!! "
A crash is a lot more expensive than the money saved on cheap shit levers.
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Old 10-03-2012, 03:44 AM   #16
YummyBurito
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Re: Front brake applying itself...

So far so good!! Still going to look into some CRG levers maybe. My front rotors have a very light shade of blue now because of this whole thing. I posted a picture of the bike. Time for new rotors?

http://img.photobucket.com/albums/v3...929_155530.jpg
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Old 11-22-2012, 01:25 AM   #17
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Re: Front brake applying itself...

Also, make sure to keep an eye on the relief hole, in the MC. If it ever gets plugged with debri, you will go over the bars.
You'd be shocked at how small that hole actually is.
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Old 01-23-2013, 10:51 AM   #18
SKARRED
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Re: Front brake applying itself...

Quote:
Originally Posted by JarvisB View Post
Even with chinese levers, they should not be an issue.
Wow, scary, scary uninformed opinion.

Last edited by SKARRED; 01-23-2013 at 10:54 AM.
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