Hey Guys,
My bike's had a problem with the front brakes pulsating for a while now. It's not an ABS pulse, it feels more like a warped rotor. I checked the service manual and it says 0.008" is the max allowable lateral run out. I checked mine and they are in the .004"-.005" range. The pulsation isn't severe enough to affect control, but it's not right and it bugs me. Could I be feeling the .005" run out or should I be looking at something else?
Thanks,
Joe
Pulsations can be caused by runout and parallelism. Parallelism is variations in rotor thickness.
Simplest way to explain the parallelism is imagine it wears a little every time it hits the high spot. Now you not only have a rotor that is warped (runout) but one that gets thinner in spots (parallelism) the pads compress and are pushed back as the rotor gets to a thicker spot. You can use a dial indicator to mark the high spots and a micrometer to measure rotor thickness at several points.
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Topic: Pulsating front brakes (Read 7284 times)