Ever so light irregular rubbing sound (new brake pads/brake bleed) - ZX6R Forum
 
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post #1 of 13 Old 04-17-2017, 01:41 PM Thread Starter
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Ever so light irregular rubbing sound (new brake pads/brake bleed)

Hey guys,

I went ahead and replaced my brake pads (double H) and also bled my brakes and put new fluid in the reservoirs. Everything seemed to be good to go, no air in the system, everything is working great on the street.

The ONLY issue that is bothering me is a very, very slight, irregular rubbing sound on the rear rotor. By irregular I mean when I put it up on the stand and spin the wheel there will be no rubbing sound but then for a split second there will be a slight grinding/rubbing sound. Again, it's only irregular and not constant at all. In fact, when riding it, I don't hear a sound at all (but then again I may not hear it).

I know my rotors are not warped. Is this something to be concerned about? Anyone have any ideas what could be amiss?

Cheers guys
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post #2 of 13 Old 04-17-2017, 01:50 PM
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How do the new pads on the front work? Good stopping power and feel? I wouldn't worry about a slight rub on the rear unless the rotor gets hot when the pads rub.
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post #3 of 13 Old 04-17-2017, 03:24 PM Thread Starter
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How do the new pads on the front work? Good stopping power and feel? I wouldn't worry about a slight rub on the rear unless the rotor gets hot when the pads rub.
From what I can tell the fronts are completely fine, no rubbing. Fronts have greats stopping power, feel great.

Now that you mention the rotor getting hot, I did feel my rear rotor and it was pretty hot (although, NOT so hot that I couldn't touch it), this was after a 10 ish minute ride down the street to put air in the tires.
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post #4 of 13 Old 04-17-2017, 03:30 PM Thread Starter
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Although, braking = friction which = shit getting hot. Correct?
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post #5 of 13 Old 04-18-2017, 07:57 AM
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Yeah, but if your rear rotor is getting hot when you're not actively applying the rear brake, it means something is rubbing enough that it's going to cause a problem.

You might check the caliper to make sure the pads are not jammed and can move freely. That allows them to 'release' properly.

Give it a 10 or 20 minute ride but be sure not to use the rear brake. Then check the rotor temp. This will tell you if something is rubbing.

If not, check your wheel bearing or chain on the sprocket.

Never ride faster than you can stop
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post #6 of 13 Old 04-18-2017, 09:22 AM
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Did you change the brakes your self? If yes hopefully you still have your old pads, take a look at them.
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post #7 of 13 Old 04-18-2017, 09:47 AM Thread Starter
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Did you change the brakes your self? If yes hopefully you still have your old pads, take a look at them.
Yeah, did the whole change myself, the wear patterns on the old/new look fairly consistent.
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post #8 of 13 Old 04-18-2017, 09:50 AM
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If you can put your fingers on the rear rotor after a ten minute ride then you are fine.
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post #9 of 13 Old 04-18-2017, 01:55 PM
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You check to see if your rotors were in spec(micrometer)? Change to a different brand or brakes? Did you follow all manufacturers steps when changing it? Im guessing it wasn't there before you change it, so something happened during installation.
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post #10 of 13 Old 04-18-2017, 02:36 PM
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Consider the possibility of the new pads not sitting perfect in the caliper until they wear in to mate with the surface of the rotor. If the rotor doesn't get to hot( can't touch it without pain) I wouldn't be too concerned unless it is making a lot of rubbing noise. I think you are hyper sensitive to it because you just worked on it and you are apprehensive.
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post #11 of 13 Old 04-20-2017, 12:05 PM Thread Starter
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Well guys, went on a good 15 minute ride and just used the front brakes to see if the rear rotor heated up. After the ride I immediately put my hand on the rotor and it was cool as a god damn cucumber.

I guess I was just hypersensitive to noise back there.
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post #12 of 13 Old 04-20-2017, 01:02 PM
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Hmm...how cool is a cucumber?
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post #13 of 13 Old 04-20-2017, 01:10 PM Thread Starter
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Hmm...how cool is a cucumber?
Lulz, let's lukewarm not even CLOSE to approaching "hot". Like if you put your hand on your rotor when it's been sitting there all day that's what it felt like.
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