Brake rotor friction

Erik Weber yoober at
Thu Aug 9 10:30:22 PDT 2007

Randy, I had my bike in the shop yesterday and someone much smarter
than me figured out the problem.

My front wheel was basically whacked out of alignment and was being
pushed over to the side by either a slightly bent fork or maybe bent
triple clamps. Also the wheel bearings were slightly pushed out making
the problem worse.

What was happening was that my caliper itself, not the pads, was
rubbing on the rotor on one side! It could have developed into a
dangerous situation, as the caliper studs that poke out and were
scraping were coming perilously close to the grooves in the rotor.

Getting the wheel closer to straight has evened out the caliper
clearances. The pads still scrape a little but it's a world of
difference now.


On 6/24/07, Randy Grein <randygrein at> wrote:
> Eric,
> I've had a lot of variance when changing wheels. What seems to help
> is to put the bike back on the stands, loosen the caliper bolts and
> tap the brake lever several times while spinning the wheel. Then
> apply the brake lever and hold it while tightening the caliper bolts.
> This seems to get the calipers seated more exactly; may or may not
> help with your noise problem.
> Randy Grein, WMRRA #41
> On Jun 23, 2007, at 6:35 PM, Erik Weber wrote:
> > Well, that makes me feel slightly better. :) But it bothers me that
> > all I did was take the wheels off and have new tires mounted and they
> > got worse. I was wondering if something could stop them from releasing
> > 100%.
> >
> > On 6/23/07, Ernest Montague <afm199 at> wrote:
> >> dunno but they are scrapy ass loud pads for sure.
> >>
> >> On Jun 23, 2007, at 4:52 PM, Erik Weber wrote:
> >>
> >> > I have a 2001 SV650S. I have the RJLs on the front, and they are
> >> > probably thicker than normal, so I never thought too much about the
> >> > fact that they scrape a little on the rotors and there is some
> >> sound
> >> > there (with no brake lever pressure). Since the bike will still do
> >> > around 130 I figured how much could it matter and it keeps the
> >> rotors
> >> > clean. :) Today I had the wheels off and now after I have put them
> >> > back on, they are scraping a lot more, to the point where when I'm
> >> > coasting someone is going to notice it. I did some laps and it
> >> was OK
> >> > but what is wrong?
> >> >
> >> > Thanks,
> >> > Erik
> >> >
> >>
> >>
> >

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