Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: When's it time to replace brake rotors?  (Read 981 times)

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  • Offline StreetCred

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    Offline StreetCred

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    • Bike: 2014 Blue Trophy SE
    • City / Town: Cedarburg, WI
    When's it time to replace brake rotors?
    on: Aug 18, 2021, 01.32 am
    Aug 18, 2021, 01.32 am
    Hi everyone!  So, my 2014 SE has 94K miles on it.  I've had it for just over a year and have put about 4K on it.  I really don't have any history on when maintenance was done.  I'm starting to hear a little grinding when I hit the brakes.  It's definitely time for pads.  My question is how do you know when it's time for rotors?  The fronts are pretty smooth.  No deep wear marks.  The rear is a little worse off but not that bad.
    Previous bikes:
    1985 FJ600
    1984 FJ1100
    2003 Aprilia RST1000

  • Offline TriumphTwo

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    Offline TriumphTwo

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    Re: When's it time to replace brake rotors?
    Reply #1 on: Aug 18, 2021, 03.54 am
    Aug 18, 2021, 03.54 am
    Hi StreetCred,
    I'd say there should be a minimum thickness marked on the rotors,  so measure the thickness and you will know when they are due.
    I haven't checked on my TTSE, but on my Sprint ST it is engraved on inner part ring holding the disc.

    Kind regrads
    Michael
    "the hair rising sound of a triple"

  • Offline Coconut   gb

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    Offline Coconut

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    Re: When's it time to replace brake rotors?
    Reply #2 on: Aug 18, 2021, 07.40 am
    Aug 18, 2021, 07.40 am
    The minimum thickness IS marked on the Discs, at least on the originals.

    If the surface of the Disc is noticeably grooved, pitted, or cracked - replace it.

    Otherwise, from the Service Manual :



    Measure the thickness in several places using an accurate micrometer or calipers.

    Measuring disc Run-Out is NOT as straight forward easy as using a Dial Gauge
    mounted on a Surface Plate to measure the Run-Out, due to the Disc being able
    to move slightly on those Bobbins.

    If you have no "judder" or "pulsing" when braking it is reasonable to assume that the Discs
    are not warped.   If you do have judder or pulsing then one or both discs may be warped,
    but this may also be caused by the Disc not running true, if it is seized on the Bobbins.
    ( There are plenty of Topics discussing "Bobbins" that can be found using the SEARCH Button.)

    Cheers  :821:



  • Offline StreetCred

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    Offline StreetCred

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    Re: When's it time to replace brake rotors?
    Reply #3 on: Aug 18, 2021, 12.45 pm
    Aug 18, 2021, 12.45 pm
    Thanks for the input!  I don't have any pulsing when braking.  The bike tracks straight and smooth.  I'll have to get in there with my calipers to check the thickness of the rotors.  With as many miles as the bike has I can't believe they're original.  So, if I do need to replace the rotors what's a good brand and good place to get them in the USA?
    Previous bikes:
    1985 FJ600
    1984 FJ1100
    2003 Aprilia RST1000

  • Offline trophied   us

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    Offline trophied

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    Re: When's it time to replace brake rotors?
    Reply #4 on: Aug 18, 2021, 01.49 pm
    Aug 18, 2021, 01.49 pm
    A few members have used EBC rotors, and some have also replaced them with the Triumph rotors.  I don't know if there is really any one way or the other.
    One of the Founding Members of the Twisted Trophies

  • Online digital   es

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    Online digital

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    Re: When's it time to replace brake rotors?
    Reply #5 on: Aug 18, 2021, 03.27 pm
    Aug 18, 2021, 03.27 pm
    I had the opportunity to carry EBC, OEM and finally Brembo brake discs mounted on the Trophy.

    Without a doubt, for me, Brembos are better than OEM and EBC.

    Braking cleaner than it does, do not nail the bike, braking very well and braking clean, whether or not you have the bike loaded.

    Of course, if I ever have to replace the brake discs again for any wheel I have, it will be with the Brembo.
    Only motorcyclists know why dogs stick their head out the car window.


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    Offline trophied

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    Re: When's it time to replace brake rotors?
    Reply #6 on: Aug 18, 2021, 05.18 pm
    Aug 18, 2021, 05.18 pm
    Do you have the Brembo part numbers for the Trophy?  Sometimes it's not so simple to find on some mfr's sites.
    One of the Founding Members of the Twisted Trophies

  • Online digital   es

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    Re: When's it time to replace brake rotors?
    Reply #7 on: Aug 18, 2021, 06.55 pm
    Aug 18, 2021, 06.55 pm
    Yes, when I get home I will look for you.
    Only motorcyclists know why dogs stick their head out the car window.