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Thread: Brake disc thickness

  1. #1
    Join Date
    31st May 2003 - 12:00
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    KTM Duke. Last ridden.....?
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    Auckland
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    Brake disc thickness

    Just trying to get a feel for when people replace their brake discs.
    The wear limit on mine is 4mm.
    The original was about 4.5mm.
    With a micrometer I measure 4.13mm.
    Is this cutting it a bit fine for a race bike? Or nah, go hard till they look likt paper?
    What do people think is a good time to replace them?
    50% worn? (4.25mm) 80%? (4.10mm)

  2. #2
    Join Date
    20th September 2004 - 12:00
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    1996 Yamaha SRV250
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    I haven't got a micrometer and I haven't replaced the discs since I bought the bike!
    Yokai - bendamindaday

  3. #3
    Join Date
    20th November 2002 - 11:00
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    SW-125R(F4-TF125), ZXRD400, RD250LC
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    I think this has been covered before - hasn't the disc got a min thickness stamped on them?

  4. #4
    Join Date
    13th January 2004 - 11:00
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    Honda PC800
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    Henderson -auckland
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    George --its really hard to advise on this one mate. optimum thickness equally optimum head dispersal etc--BUT --heck mate if ya aint using ya brakes much Id let her wear to the wear limits.
    To see a life newly created.To watch it grow and prosper. Isn't that the greatest gift a human being can be given?

  5. #5
    Join Date
    12th September 2003 - 12:00
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    Use them until the WOF inspector won't pass them or until you just can't handle the way they make the bike shudder when you put the brakes on any more ...
    And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.

    - James Dickey, Cherrylog Road.

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