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BRAKE SQUEAL DRIVING ME NUTS eee eee eee eee eee e
Posted: Sun Sep 30, 2012 8:01 pm
Author: RAYZ1
the title says it all, the back of the pads with copper grease, everything new - just eee eeee eee eee eee every 1/2 wheel turn - its like listening to pysco the movie on play loop
pads that are in are probaly crap no idea of the make but they leave a shit load of dust - any suggestions on pad types ?
also , I have de glazed them, chamfered the lealeading edge and decontaminated the disc of anything that might be on it
Posted: Sun Sep 30, 2012 8:18 pm
Author: z1bman
make sure the calliper mounting bolts are not touching the brake discs
Posted: Sun Sep 30, 2012 8:58 pm
Author: RAYZ1
z1bman wrote:make sure the calliper mounting bolts are not touching the brake discs
I will check!
Posted: Mon Oct 01, 2012 4:20 am
Author: Garn 1
RayZ1, I've tried pretty well everything to defeat this horrible squealing of these Z1 series front brake(s).
I've tried
>copper grease or back of pad,
>silicon glue,
> linishing a chamfer on the leading surface of the pad and
>cutting slots across the pad with a hacksaw blade at 6mm centres.
>
I have had the most success with those small half-moon shaped shims, that locate on a small protrusion on the rear of the pad. These are included with some pad sets.
Here is the half-moon shim I'm talking about.... seen on Ebay
A mate in West Australia solved the problem by cutting a Coke can up to that shape.
RegardZ.
Posted: Mon Oct 01, 2012 8:51 am
Author: pertonpc
Hi There,
PMC are doing repro brake pad shims for Z1 now.
http://japan.webike.net/products/20889785.html
See if Dave Marsden can order some or get them on line from webike.
From Mark
Posted: Mon Oct 01, 2012 4:30 pm
Author: PAULJAC47
I have found a lot of it is to do with the compound that some pads are composed of,non sintered pads seems to work best, but i agree that shims are worth a punt,....Paul J
Posted: Mon Oct 01, 2012 4:44 pm
Author: Al
On the J it turned out to be the spring retainer rubbing on the outside edge of the disc.
You didnt say which bike and i believe you have several types.
AL
Posted: Mon Oct 01, 2012 6:24 pm
Author: RAYZ1
zorded wrote:On the J it turned out to be the spring retainer rubbing on the outside edge of the disc.
You didnt say which bike and i believe you have several types.
AL
Al its a z1b
there is an equation to solve brake squeal
Posted: Tue Oct 02, 2012 6:57 pm
Author: RAYZ1
M¨U + D ˙U +KU + Fnl (U) = Fout
I kid you not
check this link, copy and paste it into your browser, and I thought I had just used shitty pads...
http://hal.archives-ouvertes.fr/docs/00 ... V_2009.pdf
Posted: Tue Oct 02, 2012 7:38 pm
Author: Al
Good read that, i am trying to sort out something similar with mine and its just the ticket.
If you take what you said initially at face value; a squeak every half a turn rather than every full turn that has to be a disk running out no?
The harmonic they are referring to is; under break load conditions, you seem to say it does it all the time or am i reading to much into it.
Have you measured the disk runout and material thickness at intervals round the disk.
Is it a stainless type and is it original?
Some metals i have dealt with recently of an inferior quality from import steel stockholders has had very noticeable areas (discrete) of hard and soft under machining.
Any blueing or discolouration of the disk surface.
AL
Posted: Wed Oct 03, 2012 8:48 pm
Author: RAYZ1
zorded wrote:Good read that, i am trying to sort out something similar with mine and its just ....of the disk surface.
AL
you might be right, I will check the run out, they are s/s with no blue or dicolouration , it happens when you turn the wheel by hand as well even very slowly. I have never had this in 30+ years of jap bikes