Brake Woes
Jeff Walker
walkerjl at charter.net
Mon Jul 1 07:32:56 PDT 2019
Sounds like you need to look at your brakes master cylinder and flush
the lines very, very well. If it were me I would rebuild the master
cylinder, then probably carefully disassemble the front calipers to
clean them remorselessly, spotlessly well. If the seals show no obvious
wear and are still pliable then I would try to reuse them.
The issue is that brake fluid is hydrophilic and will suck humidity
right out of the air. Those water vapor molecules accumulate to the
point of condensing into liquid water, which then causes corrosion and
can also boil again as it accumulates at the lowest point in the
system, in the calipers. You will find a bunch of dark grey "fluff" in
the fluid that is actually corrosion products. That is what needs to be
cleaned out before it damages the seals. If you have no leakage, then
the caliper seals aren't leaking. However the master cylinder seals can
leak by without any visible leakage out. The master cylinder always
wears out first because it has the largest amount of travel when
activated.
One last thing: what condition are the brake lines in? If they are the
original OEM rubber ones, you need to ditch them immediately and get
some metal braided lines. The rubber lines stretch.
Jeff in Washington
'96 Black with over 130K miles and still running strong.
On Jun 30, 2019 12:00 PM, gpzlist-request at lists.micapeak.com wrote:
Hello my friends,
I did not want to let the warmth go without taking the GPZ out for
an
hour..so I went up the Salève. On top of the Hill the front brake
did not
free up after breaking; it staid in a blocking position for some
time; I
pulled the lever a couple of times and with some mechanical noise
the brake
loosened. And did not work anymore (I could pull the lever, no
resistance).
I saw smoke around the brake but could not make out any damage (I
could
only get off the bike later..).
I descended slowly and the brake gained "power" again; once on a
level
ground I stopped the bike to inspect the damage. The only thing I
could see
was that the area where the brake line connects to the brake,
everything
was squeaky clean (on the right side, the left side was in proper
dirty
condition).
- It was very warm for our region
- I did not abuse the brake
- I had some altitude (3000ft)
Could it be that the brake fluid got "too hot" and finally the joint
let go?
What's your thoughts?
Thanks
Alex
--
--
http://alexfinger.ch for pgp key etc
------------------------------
Message: 2
Date: Sun, 30 Jun 2019 10:44:27 -0600
From: Art Johnson <arthjohnson270 at gmail.com>
To: GPZ List <gpzlist at lists.micapeak.com>
Subject: Re: Brake woes
Message-ID: <39B2BFE5-3479-477C-B983-A951413F2360 at gmail.com>
Content-Type: text/plain; charset=utf-8
Good that you got away without accident.
Any leakage or hose failure would disable the brakes. Fluid boil
might have caused lockup, cooldown release.
Time for brake maintenance, caliper clean, pad inspection, fluid
change, replace banjo bolt washers, any defective items, operation
check.
Sent from my iPhone
> On Jun 30, 2019, at 9:58 AM, Alexander Finger
<af at genevainformation.ch> wrote:
>
> Hello my friends,
> I did not want to let the warmth go without taking the GPZ out for
an
> hour..so I went up the Salève. On top of the Hill the front brake
did not
> free up after breaking; it staid in a blocking position for some
time; I
> pulled the lever a couple of times and with some mechanical noise
the brake
> loosened. And did not work anymore (I could pull the lever, no
resistance).
> I saw smoke around the brake but could not make out any damage (I
could
> only get off the bike later..).
> I descended slowly and the brake gained "power" again; once on a
level
> ground I stopped the bike to inspect the damage. The only thing I
could see
> was that the area where the brake line connects to the brake,
everything
> was squeaky clean (on the right side, the left side was in proper
dirty
> condition).
> - It was very warm for our region
> - I did not abuse the brake
> - I had some altitude (3000ft)
> Could it be that the brake fluid got "too hot" and finally the
joint let go?
> What's your thoughts?
> Thanks
> Alex
>
> --
> --
> http://alexfinger.ch for pgp key etc
>
____________________________________________________________________
__
> GENERAL GPZList MAILING LIST INFORMATION:
> This is from the GPZList mailing list. GPZList at lists.micapeak.com
> http://lists.micapeak.com/mailman/listinfo/gpzlist
> You subscribed to this mailing list. Therefore, you solicited all
> mail that you receive from this list. Therefore, ANY mail that you
> receive from this list is, by definition, NOT Spam, and if you
report
> it as such, you are violating the lists.micapeak.com terms of
service.
>
> To unsubscribe, you may send email to
gpzlist-unsubscribe at lists.micapeak.com
>
____________________________________________________________________
__
> YOUR PERSONAL SUBSCRIBER OPTIONS:
> Unsubscribe or choose new options at
>
http://lists.micapeak.com/mailman/options/gpzlist/arthjohnson270%40g
mail.com
> You are subscribed at the email address arthjohnson270 at gmail.com
>
____________________________________________________________________
__
------------------------------
Message: 3
Date: Sun, 30 Jun 2019 19:49:16 +0200
From: Alexander Finger <af at genevainformation.ch>
To: GPZ List <gpzlist at lists.micapeak.com>
Subject: Re: Brake woes
Message-ID:
<CAKO=xBsVjFM_DPMQxCXqO2i0JqmLdKkqae37=gsqGrU_tskwjA at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I was slow when they blocked. So it's off to the dealer for a brake
job
then..I hope it'll not cost more than the downpayment for a new zzr.
Art Johnson <arthjohnson270 at gmail.com> schrieb am So., 30. Juni
2019, 18:44:
> Good that you got away without accident.
> Any leakage or hose failure would disable the brakes. Fluid boil
might
> have caused lockup, cooldown release.
> Time for brake maintenance, caliper clean, pad inspection, fluid
change,
> replace banjo bolt washers, any defective items, operation check.
>
> Sent from my iPhone
>
> > On Jun 30, 2019, at 9:58 AM, Alexander Finger
<af at genevainformation.ch>
> wrote:
> >
> > Hello my friends,
> > I did not want to let the warmth go without taking the GPZ out
for an
> > hour..so I went up the Salève. On top of the Hill the front
brake did not
> > free up after breaking; it staid in a blocking position for some
time; I
> > pulled the lever a couple of times and with some mechanical
noise the
> brake
> > loosened. And did not work anymore (I could pull the lever, no
> resistance).
> > I saw smoke around the brake but could not make out any damage
(I could
> > only get off the bike later..).
> > I descended slowly and the brake gained "power" again; once on
a level
> > ground I stopped the bike to inspect the damage. The only thing
I could
> see
> > was that the area where the brake line connects to the brake,
everything
> > was squeaky clean (on the right side, the left side was in
proper dirty
> > condition).
> > - It was very warm for our region
> > - I did not abuse the brake
> > - I had some altitude (3000ft)
> > Could it be that the brake fluid got "too hot" and finally the
joint let
> go?
> > What's your thoughts?
> > Thanks
> > Alex
> >
> > --
> > --
> > http://alexfinger.ch for pgp key etc
> >
____________________________________________________________________
__
> > GENERAL GPZList MAILING LIST INFORMATION:
> > This is from the GPZList mailing list.
GPZList at lists.micapeak.com
> > http://lists.micapeak.com/mailman/listinfo/gpzlist
> > You subscribed to this mailing list. Therefore, you solicited
all
> > mail that you receive from this list. Therefore, ANY mail that
you
> > receive from this list is, by definition, NOT Spam, and if you
report
> > it as such, you are violating the lists.micapeak.com terms of
service.
> >
> > To unsubscribe, you may send email to
> gpzlist-unsubscribe at lists.micapeak.com
> >
____________________________________________________________________
__
> > YOUR PERSONAL SUBSCRIBER OPTIONS:
> > Unsubscribe or choose new options at
> >
>
http://lists.micapeak.com/mailman/options/gpzlist/arthjohnson270%40g
mail.com
> > You are subscribed at the email address arthjohnson270 at gmail.com
> >
____________________________________________________________________
__
>
____________________________________________________________________
__
> GENERAL GPZList MAILING LIST INFORMATION:
> This is from the GPZList mailing list. GPZList at lists.micapeak.com
> http://lists.micapeak.com/mailman/listinfo/gpzlist
> You subscribed to this mailing list. Therefore, you solicited all
> mail that you receive from this list. Therefore, ANY mail that you
> receive from this list is, by definition, NOT Spam, and if you
report
> it as such, you are violating the lists.micapeak.com terms of
service.
>
> To unsubscribe, you may send email to
> gpzlist-unsubscribe at lists.micapeak.com
>
____________________________________________________________________
__
> YOUR PERSONAL SUBSCRIBER OPTIONS:
> Unsubscribe or choose new options at
>
http://lists.micapeak.com/mailman/options/gpzlist/af%40genevainforma
tion.ch
> You are subscribed at the email address AF at genevainformation.ch
>
____________________________________________________________________
__
>
------------------------------
Message: 4
Date: Sun, 30 Jun 2019 12:30:53 -0600
From: Art Johnson <arthjohnson270 at gmail.com>
To: GPZ List <gpzlist at lists.micapeak.com>
Subject: Re: Brake woes
Message-ID: <D9B3F515-0AA7-4603-867C-A3F9C54ED4D1 at gmail.com>
Content-Type: text/plain; charset=utf-8
Hope it works out for you Alex. Fun fast rides for cheap thrills.
I left my Gpz in Venezia....
The GPz is reliable. Hope to do more Euro adventures over the next 5
yrs. Croatia and Rome this Fall. Then Spain, Portugal and S. France,
next. Work north to Sweden, Norway, UK and Ireland.
Bought a 2007 Zx14 (ZZR) for home. The front brakes are so much
better.
Going thru the maintenance routine, coolant, brake fluid change,
sparkplugs, valve shims, air filter. Tires and chain good. Tsukigi
4-1 pipe and ECU reprogram next.
Sent from my iPhone
> On Jun 30, 2019, at 11:49 AM, Alexander Finger
<af at genevainformation.ch> wrote:
>
> I was slow when they blocked. So it's off to the dealer for a
brake job
> then..I hope it'll not cost more than the downpayment for a new
zzr.
>
> Art Johnson <arthjohnson270 at gmail.com> schrieb am So., 30. Juni
2019, 18:44:
>
>> Good that you got away without accident.
>> Any leakage or hose failure would disable the brakes. Fluid boil
might
>> have caused lockup, cooldown release.
>> Time for brake maintenance, caliper clean, pad inspection, fluid
change,
>> replace banjo bolt washers, any defective items, operation check.
>>
>> Sent from my iPhone
>>
>>> On Jun 30, 2019, at 9:58 AM, Alexander Finger
<af at genevainformation.ch>
>> wrote:
>>>
>>> Hello my friends,
>>> I did not want to let the warmth go without taking the GPZ out
for an
>>> hour..so I went up the Salève. On top of the Hill the front
brake did not
>>> free up after breaking; it staid in a blocking position for some
time; I
>>> pulled the lever a couple of times and with some mechanical
noise the
>> brake
>>> loosened. And did not work anymore (I could pull the lever, no
>> resistance).
>>> I saw smoke around the brake but could not make out any damage
(I could
>>> only get off the bike later..).
>>> I descended slowly and the brake gained "power" again; once on
a level
>>> ground I stopped the bike to inspect the damage. The only thing
I could
>> see
>>> was that the area where the brake line connects to the brake,
everything
>>> was squeaky clean (on the right side, the left side was in
proper dirty
>>> condition).
>>> - It was very warm for our region
>>> - I did not abuse the brake
>>> - I had some altitude (3000ft)
>>> Could it be that the brake fluid got "too hot" and finally the
joint let
>> go?
>>> What's your thoughts?
>>> Thanks
>>> Alex
>>>
>>> --
>>> --
>>> http://alexfinger.ch for pgp key etc
>>>
____________________________________________________________________
__
>>> GENERAL GPZList MAILING LIST INFORMATION:
>>> This is from the GPZList mailing list.
GPZList at lists.micapeak.com
>>> http://lists.micapeak.com/mailman/listinfo/gpzlist
>>> You subscribed to this mailing list. Therefore, you solicited
all
>>> mail that you receive from this list. Therefore, ANY mail that
you
>>> receive from this list is, by definition, NOT Spam, and if you
report
>>> it as such, you are violating the lists.micapeak.com terms of
service.
>>>
>>> To unsubscribe, you may send email to
>> gpzlist-unsubscribe at lists.micapeak.com
>>>
____________________________________________________________________
__
>>> YOUR PERSONAL SUBSCRIBER OPTIONS:
>>> Unsubscribe or choose new options at
>>>
>>
http://lists.micapeak.com/mailman/options/gpzlist/arthjohnson270%40g
mail.com
>>> You are subscribed at the email address arthjohnson270 at gmail.com
>>>
____________________________________________________________________
__
>>
____________________________________________________________________
__
>> GENERAL GPZList MAILING LIST INFORMATION:
>> This is from the GPZList mailing list. GPZList at lists.micapeak.com
>> http://lists.micapeak.com/mailman/listinfo/gpzlist
>> You subscribed to this mailing list. Therefore, you solicited all
>> mail that you receive from this list. Therefore, ANY mail that
you
>> receive from this list is, by definition, NOT Spam, and if you
report
>> it as such, you are violating the lists.micapeak.com terms of
service.
>>
>> To unsubscribe, you may send email to
>> gpzlist-unsubscribe at lists.micapeak.com
>>
____________________________________________________________________
__
>> YOUR PERSONAL SUBSCRIBER OPTIONS:
>> Unsubscribe or choose new options at
>>
http://lists.micapeak.com/mailman/options/gpzlist/af%40genevainforma
tion.ch
>> You are subscribed at the email address AF at genevainformation.ch
>>
____________________________________________________________________
__
>>
>
____________________________________________________________________
__
> GENERAL GPZList MAILING LIST INFORMATION:
> This is from the GPZList mailing list. GPZList at lists.micapeak.com
> http://lists.micapeak.com/mailman/listinfo/gpzlist
> You subscribed to this mailing list. Therefore, you solicited all
> mail that you receive from this list. Therefore, ANY mail that you
> receive from this list is, by definition, NOT Spam, and if you
report
> it as such, you are violating the lists.micapeak.com terms of
service.
>
> To unsubscribe, you may send email to
gpzlist-unsubscribe at lists.micapeak.com
>
____________________________________________________________________
__
> YOUR PERSONAL SUBSCRIBER OPTIONS:
> Unsubscribe or choose new options at
>
http://lists.micapeak.com/mailman/options/gpzlist/arthjohnson270%40g
mail.com
> You are subscribed at the email address arthjohnson270 at gmail.com
>
____________________________________________________________________
__
End of GPZList Digest, Vol 141, Issue 1
***************************************
More information about the GPZList
mailing list