Brake squeal fixed. - Wrist Twisters
 
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post #1 of 10 Old 08-01-2019, 12:44 AM Thread Starter
Pilus Posterior
 
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Brake squeal fixed.

Bought a can of brake parts cleaner from Walmart

took the pads out, calipers off washed with soap and water.

sanded the pads and disk to bust off some of the glaze using 180 sand paper.

Cleaned everything off with the brake cleaner.

Added a small dab of caliper grease on the little spring tab.

Went for a test ride and had less braking power but the noise was gone. After about 50 miles, I could feel the power coming back and no noise.

IDK what the cause was, my best guess is the glaze on the two surfaces.

Good thing I took things apart, the pads are about 1/2 used now. I guess 10,000 miles will do that to a new set of pads.

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post #2 of 10 Old 08-03-2019, 12:52 AM Thread Starter
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Looks like I spoke too soon. The noise is back, just not as bad. That tells me it's probably the glaze. Since my new pads are about 8,000 miles old now, maybe I'll get new pads and rework the rotors.

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post #3 of 10 Old 08-03-2019, 01:13 AM
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Do you think your current pads have been contaminated with any fluids?

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post #4 of 10 Old 08-03-2019, 05:32 AM
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I always use OEM pads. Typically I change pads out at 20,000 miles. They'd probably go a while longer, but if I got 20,000 out of them, I got my money's worth.

I've never had a set of rotors glaze over. But like I said in the other thread, I blast the pads with the garden hose, every so often. Sometimes, it's a little surprising how much dirt comes off.

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post #5 of 10 Old 08-03-2019, 09:22 AM Thread Starter
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Quote:
Originally Posted by Islandboy View Post
Do you think your current pads have been contaminated with any fluids?
I just put these pads on about 3 months ago and only bled the brakes that one time. They don't look like there's anything on them, but they do look rougher than I expected. Maybe because the disks area a bit old and not perfectly smooth.

I didn't scuff up the surface when I put on the new pads, but they didn't have a problem for some 8,000 miles.

I guess motorcycle rotors aren't really turned, so if you want a smooth surface, you have to get new rotors.

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post #6 of 10 Old 08-03-2019, 04:25 PM
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The price of OEM front brake rotors is very high. Not sure if I'd want to fork out that much.
If replacing I might look for a pair of good condition OEM secondhand ones.
Anyone heard/opinion on the Tourmax brand?
https://rover.ebay.com/rover/0/0/0?m...2F113760016060

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post #7 of 10 Old 08-03-2019, 05:40 PM
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My brakes squeal incredibly loud ever since I put on the C59 brake pads. I think it's funny so I haven't really bothered. I think I may have overheated them doing some braking drills, I'll try scuffing them up and the rotor and see if it makes a difference. They are still miles better than the OEM pads but they don't have the incredible initial bite they had when new.

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post #8 of 10 Old 08-04-2019, 12:42 AM Thread Starter
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Quote:
Originally Posted by nathanktm View Post
My brakes squeal incredibly loud ever since I put on the C59 brake pads. I think it's funny so I haven't really bothered. I think I may have overheated them doing some braking drills, I'll try scuffing them up and the rotor and see if it makes a difference. They are still miles better than the OEM pads but they don't have the incredible initial bite they had when new.
Guy at the bike shop says it's because of the grooves, but it didn't have any problem until I got new pads. I guess the old pads matched the grooves or something.

I think they're made of stainless steel and they say it can't be turned. After I scuffed mine, it was good for about 200~300 miles, then it slowly started back up.

I'm thinking maybe I'll rebuild the whole thing, lines, pads, disks... I'd also like to get rid of the levers too.

Maybe the best idea is to do a conversion from some other bike.

Anyone know what bikes are bolt on replacements and have same or better power? IDK if the 919 is known for poor brakes.

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post #9 of 10 Old 08-04-2019, 12:45 AM Thread Starter
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Quote:
Originally Posted by Islandboy View Post
The price of OEM front brake rotors is very high. Not sure if I'd want to fork out that much.
If replacing I might look for a pair of good condition OEM secondhand ones.
Anyone heard/opinion on the Tourmax brand?
https://rover.ebay.com/rover/0/0/0?m...2F113760016060
The thing about 2nd hand is how would I know if they are better than mine? I had zero brake noise or problems until this year. The change of the pads triggered this, maybe getting metal to metal for a bit was enough, IDK.

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post #10 of 10 Old 08-04-2019, 02:58 AM
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I had squeal sometimes with my stock set-up, and then mostly I didn't. I'd try running them for longer, see if the squeal goes away.

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