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  1. #1
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    Reputation: alfa75's Avatar
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    lefty max carbon:vibrations during braking

    today a noticed when braking ( front only) that the lefty does vibrate !
    backNforth not sideways.

    any Id's?

  2. #2
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    Reputation: sanjuro's Avatar
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    And how did you determine the fork was vibrating?

  3. #3
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    It's more likely that you are having an issue with the disc brake rotor and/or pads which is causing the vibration.

  4. #4
    LA CHÈVRE
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    Agreed, check the brake, might not be aligned properly in any or all axis.

    DAN.GEROUS.NET : MOUNTAIN BIKING : CYCLOCROSS : ROAD :

  5. #5
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    Quote Originally Posted by sanjuro
    And how did you determine the fork was vibrating?
    i felt vibrations and i lean over the steerer to look at the lefty and i can see its moving !
    brakes are fine! pads are in good condition and caliper aligned.

    can it be the headset bearing! i don't feel play but when riding maybe ?

  6. #6
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    What brakes are you using? Magura Marta SL 2009? If so, vibrations are due to the design of the wave rotor. More here on the official Magura support forum.

  7. #7
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    Quote Originally Posted by madskatingcow
    What brakes are you using? Magura Marta SL 2009? If so, vibrations are due to the design of the wave rotor. More here on the official Magura support forum.
    no, shimano XT older model! but never had that before?
    it does that only at highspeed, and when i slow down it goes away

  8. #8
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    Can you be more specific on what you see moving? Either you have some type of major mechanical problems between the upper and lower Lefty tubes, the steerer clamps are loose or there is a headset bearing issue. I just can't imagine what would cause the large diameter Lefty tube to actually vibrate as a single unit. I also have a Left Max Carbon 140 on my Prophet and have never experienced this problem. There can't be an issue with the wheel bearings because that would not cause the entire Lefty to visibly move.

  9. #9
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    later today i will take a video-shot with my canon so you can see it

  10. #10
    Just a flesh wound
    Reputation: Prophet Julio's Avatar
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    Brakes

    That's my guess. Warped rotor or swept rotor. Not the Lefty.

  11. #11
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    on the video clip its not clear to see the vibration with the camera in my hand.

    but i think i found the problem, there is play on the lower headset bearing !
    the upper bearing is fine.
    thats why the lefty moves when braking.

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