Brake Woes
Alexander Finger
af at genevainformation.ch
Mon Jul 1 09:13:10 PDT 2019
Thanks, I'll have them change the lines..
rgds
Alex
Jeff Walker <walkerjl at charter.net> schrieb am Mo., 1. Juli 2019, 16:33:
> 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
> >
> ____________________________________________________________________
> __
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> ____________________________________________________________________
> __
>
> ------------------------------
>
> 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:
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> ____________________________________________________________________
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>
> ------------------------------
>
> 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.
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> >>>
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> >>
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> >
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