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External
Since: Oct 08, 2003
Posts: 284
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(Msg. 1) Posted: Tue Jun 22, 2004 7:26 pm
Post subject: Brakes won't bleed
Archived from groups: rec>motorcycles>dirt (more info?)
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I recently picked up a 89 KDX 200 for my daughter and have been doing some
of the neglected maintenance. I am stumped at the moment with the front
brake. I can bleed the brake and and have a firm lever at one moment and
after letting the bike sit then there is no brake at all. I am not finding
any leak in the line or in the caliper but the brake just wont hold its own.
Any ideas?
OP |
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External
Since: Jun 27, 2003
Posts: 317
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(Msg. 2) Posted: Tue Jun 22, 2004 10:47 pm
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Tue, 22 Jun 2004 18:26:24 -0500, "optaylor"
<optaylor.RemoveThis@cox-internet.com> wrote:
>I recently picked up a 89 KDX 200 for my daughter and have been doing some
>of the neglected maintenance. I am stumped at the moment with the front
>brake. I can bleed the brake and and have a firm lever at one moment and
>after letting the bike sit then there is no brake at all. I am not finding
>any leak in the line or in the caliper but the brake just wont hold its own.
>Any ideas?
>
>OP
>
Did you have the cap off the master cylinder when you bled it?
If not you may have created a vacuum inside. Also make sure your
rubber doohickey (technical term) in the cap is pushed in.
Mur<!-- ~MESSAGE_AFTER~ --> |
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External
Since: Aug 18, 2003
Posts: 491
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(Msg. 3) Posted: Wed Jun 23, 2004 12:46 am
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"optaylor" <optaylor.TakeThisOut@cox-internet.com> wrote:
>I recently picked up a 89 KDX 200 for my daughter and have been doing some
>of the neglected maintenance. I am stumped at the moment with the front
>brake. I can bleed the brake and and have a firm lever at one moment and
>after letting the bike sit then there is no brake at all. I am not finding
>any leak in the line or in the caliper but the brake just wont hold its own.
>Any ideas?
>
>OP
Bad seals? A switch in fluid-type can gork the seals, right?
-keith
ktm300mxc<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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External
Since: Jun 23, 2003
Posts: 241
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(Msg. 4) Posted: Wed Jun 23, 2004 6:52 am
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Check the seals in the plunger at the master cylinder. Generally,
there are two. If the inner one gets a small hole in it, it can let
fluid pass at times and not at others. Sometimes, say with a different
speed pulling the lever or after or before sitting, it can seal and
other times it won't. You won't see any leakage because the outer seal
still keeps the fluid in the housing.
I've seen this happen before, most recently to my neighbor's kid's
bike, a KX85.
Also, use the right fluid. Generally, I'm the first guy to use cheap
stuff that works, such as steel sprockets, certain car oils, cut my
own gaskets sometimes, etc., but there are some brake fluids that just
don't cut it for a bike, not necessarily because they're cheap but how
they are formulated. Use motorcycle-specific brake fluids and don't
buy in bulk because it can go bad on the shelf.
James
00CR250
"optaylor" <optaylor.TakeThisOut@cox-internet.com> wrote...
> I recently picked up a 89 KDX 200 for my daughter and have been doing some
> of the neglected maintenance. I am stumped at the moment with the front
> brake. I can bleed the brake and and have a firm lever at one moment and
> after letting the bike sit then there is no brake at all. I am not finding
> any leak in the line or in the caliper but the brake just wont hold its own.
> Any ideas?
>
> OP<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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External
Since: Aug 26, 2003
Posts: 87
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(Msg. 5) Posted: Wed Jun 23, 2004 2:00 pm
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"optaylor" <optaylor.TakeThisOut@cox-internet.com> wrote in message
news:10dhfun1nm6fm67@corp.supernews.com...
> I recently picked up a 89 KDX 200 for my daughter and have been doing
some
> of the neglected maintenance. I am stumped at the moment with the front
> brake. I can bleed the brake and and have a firm lever at one moment and
> after letting the bike sit then there is no brake at all. I am not finding
> any leak in the line or in the caliper but the brake just wont hold its
own.
> Any ideas?
>
> OP
>
>
You have air in the system. Sometimes tying the brake lever down over night
will let it rise to the top.
Noob<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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External
Since: Jun 21, 2004
Posts: 14
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(Msg. 6) Posted: Wed Jun 23, 2004 2:50 pm
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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>On Tue, 22 Jun 2004 23:46:55 GMT, DirtCrashr <Dirt.RemoveThis@Crashr.org> wrote:
>"optaylor" <optaylor.RemoveThis@cox-internet.com> wrote:
>
>>I recently picked up a 89 KDX 200 for my daughter and have been doing some
>>of the neglected maintenance. I am stumped at the moment with the front
>>brake. I can bleed the brake and and have a firm lever at one moment and
>>after letting the bike sit then there is no brake at all. I am not finding
>>any leak in the line or in the caliper but the brake just wont hold its own.
>>Any ideas?
>>
>>OP
>
>Bad seals? A switch in fluid-type can gork the seals, right?
>
>-keith
>
>ktm300mxc
OP, I'm inclined to believe that it is one of two causes.
1.Very thin brake pads.
2.Air still in the system.
I had these exact symptons the day before the '88 Bear Creek Enduro.
The pads were down to the metal. Worked fine after installing new
pads.
I bleed by brakes by purging the system backwards from the bleed
screw with a hand pump. (Josh uses a large syringe)
Jim Cook
Gas Gas Woods Rider
Team LAGNAF
BJEC/SERA/TSCEC/AHSCS
<a style='text-decoration: underline;' href="http://www.smackovermotorsports.com" target="_blank">www.smackovermotorsports.com</a><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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External
Since: Jul 02, 2003
Posts: 1240
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(Msg. 7) Posted: Wed Jun 23, 2004 3:00 pm
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Wed, 23 Jun 2004, Kim Neubert wrote:
>
> "optaylor" <optaylor RemoveThis @cox-internet.com> wrote in message
> news:10dhfun1nm6fm67@corp.supernews.com...
> > I recently picked up a 89 KDX 200 for my daughter and have been doing
> some
> > of the neglected maintenance. I am stumped at the moment with the front
> > brake. I can bleed the brake and and have a firm lever at one moment and
> > after letting the bike sit then there is no brake at all. I am not finding
> > any leak in the line or in the caliper but the brake just wont hold its
> own.
> > Any ideas?
> >
> > OP
> >
>
> You have air in the system. Sometimes tying the brake lever down over night
> will let it rise to the top.
>
> Noob
You may need to get the bleed nipple higher than the MC. Remove the
caliper and hang it from the ceiling w/a bungie cord or somesuch. Use an
old brake pad or whatever you might have that's about the same thickness
as the rotor to put between the pads and bleed that way. You'll want to
put a length of clear tubing on the nipple so you don't squirt brake fluid
on your head.  An extra pair of hands is helpful, but not necessary.
Good luck,
Craig<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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External
Since: Oct 07, 2003
Posts: 77
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(Msg. 8) Posted: Wed Jun 23, 2004 6:09 pm
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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optaylor wrote:
>
> Any ideas?
OP
Had a 90 KDX with similar problem. Endless tries at bleeding it the
"normal" way would still leave them soft. Finally resolved it by
breaking loose (slightly) the banjo bolt at the connection to the master
cylinder and bleeding it backwards similar to what Jim describes. Air
seemed to get trapped somewhere around the banjo bolt/master cylinder
connection.
Jerry<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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External
Since: May 28, 2004
Posts: 126
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(Msg. 9) Posted: Wed Jun 23, 2004 7:16 pm
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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External
Since: Jul 28, 2003
Posts: 47
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(Msg. 10) Posted: Wed Jun 23, 2004 7:18 pm
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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My KX did the same thing. You need to replace the cups in the master
cylinder. They will work OK to pump it up but will bleed by after
sitting around. If you just had air you would still have some brake it
would just be spongy.
Jerry Puckett wrote:
>
> optaylor wrote:
> >
> > Any ideas?
>
> OP
> Had a 90 KDX with similar problem. Endless tries at bleeding it the
> "normal" way would still leave them soft. Finally resolved it by
> breaking loose (slightly) the banjo bolt at the connection to the master
> cylinder and bleeding it backwards similar to what Jim describes. Air
> seemed to get trapped somewhere around the banjo bolt/master cylinder
> connection.
> Jerry<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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External
Since: Jun 18, 2003
Posts: 857
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(Msg. 11) Posted: Wed Jun 23, 2004 9:13 pm
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Wudsracer wrote:
> I bleed by brakes by purging the system backwards from the bleed
> screw with a hand pump. (Josh uses a large syringe)
>
That is the ONLY sure fire way to bleed motorcycle brakes!!!!!!!!!<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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External
Since: Jul 02, 2003
Posts: 1240
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(Msg. 12) Posted: Thu Jun 24, 2004 11:05 am
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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External
Since: Jan 14, 2004
Posts: 436
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(Msg. 13) Posted: Thu Jun 24, 2004 12:56 pm
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Dumbass.
"Craig Faison" <cfaison RemoveThis @magpage.com> wrote in message
news:Pine.BSF.4.33.0406241005140.9680-100000@alaska.magpage.com...
> On Wed, 23 Jun 2004, Spodely wrote:
>
> > You said nipple.
>
> Shut up, Beavis.
>
> Cornholio
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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External
Since: Jun 22, 2004
Posts: 1
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(Msg. 14) Posted: Wed Jun 30, 2004 11:16 am
Post subject: Re: Brakes won't bleed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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All of the above are true. I had several KX's from that era and they all
had the same problem. Having the brake line straight when bleeding helped
but the best way is to get a giant sringe, put a short length of hose on
the end and push the fresh fluid from the bottom up. This pushes the air
out. Make sure you have plenty of rags around the master cylinder. You ned
to make sure the hoses is a tight seal on the nipple and sringe otherwise
it defeats the purpose. Worked for me every time.
Gilly
On Tue, 22 Jun 2004 18:26:24 -0500, optaylor <optaylor.RemoveThis@cox-internet.com>
wrote:
> I recently picked up a 89 KDX 200 for my daughter and have been doing
> some
> of the neglected maintenance. I am stumped at the moment with the front
> brake. I can bleed the brake and and have a firm lever at one moment and
> after letting the bike sit then there is no brake at all. I am not
> finding
> any leak in the line or in the caliper but the brake just wont hold its
> own.
> Any ideas?
>
> OP
>
>
>
--
Using M2, Opera's revolutionary e-mail client: <a style='text-decoration: underline;' href="http://www.opera.com/m2/" target="_blank">http://www.opera.com/m2/</a><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Brakes won't bleed |
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