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CrazyMotorcycleGuy, MPSniper
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Brake rotors warped diagnostics
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My Chicken eats Busa's
 
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Brake rotors warped diagnostics - November 8, 2013, 11:51 AM

Someone brought in a bike this week that had "weak brakes" and thought there might be some air in the line. The first thing I did was pump the line a bit to bring the pressure up. Then I pushed the bike forward a few feet. All the pressure in the line was suddenly gone. This is usually a good indicator that the rotors are warped, or at least one of them. The reason is that as the rotor rotates, it pushes the brake pads back, thus requiring more pumping to bring up the pressure again. But, just to be sure, we pulled the wheel and put it on a dial caliper. BTW, can anybody teach me how to embed objects here, please?

video-2013-11-01-15-08-56.mp4 Video by brookscycles | Photobucket


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Typical Stripper
 
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November 8, 2013, 11:57 AM

That is straight up BENT! That likely from an impact of some sort.


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November 8, 2013, 12:01 PM

Good tip! Never thought of it in that way, but it makes sense.


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November 9, 2013, 07:24 AM

Wowsers.

The fact that some people survive riding bikes, despite themselves, is always amazing to me.
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GDMFSOB
 
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November 9, 2013, 09:06 AM

Can't help ya on the embedding with Photobucket, but dude hit something for sure. I had the same situation at VIR after tagging the rear of another bike going into 7. Luckily it was the carrier that had bent and I trued it up again.


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