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Post by katt on Jun 5, 2018 0:26:02 GMT -5
I know in the front i have slightly bent rotor that squeaks, its cheap fix, however in the back i got squeaking also after putting new brake pads.
This is brake pads i used. 
Don't think its brake pads because its like 1 short squeak impulse not constant.
Probably also uneven wear on the rim inside part that comes in contact with brake pad, can it be fixed without taking rim to be machined?
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Post by 90GTVert on Jun 5, 2018 14:37:14 GMT -5
Usually my quick try is to sand both the shoes and the drum lightly to deglaze and then clean with brake parts cleaner and reassemble. Also check the cable and levers to make sure it's not a noise there.
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Post by katt on Jun 5, 2018 19:56:06 GMT -5
Stupid question, but what grit sandpaper should i use to start and to finish up?
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Post by 90GTVert on Jun 5, 2018 21:13:34 GMT -5
~150 grit emery cloth/sandpaper is usually what I grab.
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Post by katt on Jun 15, 2018 5:33:03 GMT -5
What's the theory behind sanding it? I currently have tiny grooves along entire brake pad contact area, they seem unworn, do i supposed to sand them all off?
When i take wheel off and clean the buildup it seems like squeaking goes away, however after few day's its back. Could it be brake pads that causing this? |
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Post by tsimi on Jun 15, 2018 5:40:50 GMT -5
I had the same issue on my Prebug Zuma rear brake. I tried sanding and cleaning but it didn't go away. Finally replaced the brake shoe and voila gone! The old brake shoe had still a lot meat on it but for unknown reasons it wouldn't stop squeak.
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Post by katt on Jun 15, 2018 5:53:33 GMT -5
I had the same issue on my Prebug Zuma rear brake. I tried sanding and cleaning but it didn't go away. Finally replaced the brake shoe and voila gone! The old brake shoe had still a lot meat on it but for unknown reasons it wouldn't stop squeak. Do you have link to new shoe you used? |
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Post by tsimi on Jun 15, 2018 7:00:17 GMT -5
I ordered my brake shoe at webike Japan. But here is the same product on their global site. japan.webike.net/products/1792355.html
I've noticed some pads are just loud. I've heard the malossi ones squeak like crazy. I guess you would get same results with the Malossi brake shoe which looks similar just different color. |
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Post by ThaiGyro on Jun 15, 2018 7:31:20 GMT -5
Could be that some shoe backings are not true...meaning the arc is wrong, so at a given pressure from the lever it has more binding in one spot. That is one reason that you should "break in" shoes and pads. My guess is that if the arc is slightly bad, the brake material would eventually adapt...and get hot. Glaze in the hot spot.
Mind you, by today's standards I am an old folkker. In my high school days, one of my many jobs was brake and clutch jobs at a friends gas/service station. We had a hydraulic press that would accept a shoe and "re-arc" the steel backing.
Just a thought...
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Post by benji on Jun 15, 2018 9:16:52 GMT -5
I've noticed some pads are just loud. I've heard the malossi ones squeak like crazy.
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Post by GrumpyUnk on Jun 16, 2018 11:20:33 GMT -5
One alternative to replacing with another set of shoes is to give the current shoes a good 'heating' break-in.
When replacing disk brake pads, it is recommended (by some) to do ten good hard stops from ~50mph, then release the brakes, let them cool for a minute or so, and repeat the hard stop. The pads and rotor take on chemical/atomic level reactions. The pads & rotor 'mate' to each other.
It may be the shoes need to get hot then cooled, then hot again to get them 'seated'. Back when, I always treated new pads/rotors/shoes/drums with 'kid gloves' babying them for the first hundred miles or so. That was not the thing to do.
I'd give them a workout and see what happens. Can't hurt if you are planning to replace the shoes with another set.
tom
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Post by katt on Jun 16, 2018 12:07:26 GMT -5
Already did like 500+miles on brake pads and i always use rear brake when stopping except situation when i dont want to embrace myself and opt for front brake only.
Checked my brake disk shell with laser thermometer at the end of the day it always measure 45-50*C after every ride (FYI front disk and caliper about 35*c).
How much heat i am trying to get rear pads to? for braking them in?
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Post by greginisn on Jun 18, 2018 0:23:44 GMT -5
When sanding on pads & drums concentrate on anything that looks glazed or shiny and that shoe you posted a photo of looks way more complex than standard pad. some times a premium pad (with metals in it) will squeak and squeal like mad. Annoying but OK.
Is it less noisy with a harder application? Try a cheaper more simple pad.
Good luck, Greg
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Post by katt on Jun 18, 2018 11:35:55 GMT -5
Is it less noisy with a harder application? Yes only on when pressing lightly it makes noise, hard press is okay.
Also in the beginning of ride in the morning it makes noise when cold.
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Post by greginisn on Jun 19, 2018 0:12:46 GMT -5
Unless the noise just drives you bonkers I don't think you need to fix that problem.
Good luck Greg
(buy cheaper pads)
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