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Pinned How to Free Up Motorcycle Brake Disc Bobbins

Discussion in 'Tech Tips' started by GreyImport, May 12, 2021.

  1. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    'You learn something new every day" .... well sorta

    I knew about floating front rotors but not this little maintenance trick

    These were the 2 solutions a fella (on a Daytona) used to solve his front end chatter/pulsing problems when hard braking from 200kph , Im guessing on track ..... not that Ill be doing that anytime soon

    But front brakes and their upkeep comes in handy sometimes



    And front caliper/fork alignment

     
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  2. TonyZXR

    TonyZXR Well-Known Member

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    Wow thats pretty interesting, wondering if thats why i've been having brake shuddering issues with my zxr's. I just assumed it was warped rotors
     
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  3. inchoate

    inchoate Well-Known Member

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    I like Dave Moss a lot. His style of explanation works really well for me because there’s always a “why” to everything.
     
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  4. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    That's exactly what it will be...well, it was the last time I had shudder.
     
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  5. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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  6. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Hooray, yes this is the way to do it. Just to add to this. If you have an old bike and you are a bit suspect about the straightness of the stanchions then:
    1/ Support the front of the bike off the ground.
    2/ Remove the wheel and guard
    3/ Remove the fork caps
    4/ Push the lower leg up and down to check for stiction. If there is any then rotate the lower leg to find the point of least resistance. Then loosen the triple clamps and rotate the stanchion to bring the assembly into that position.
    5/ Repeat for the other side.
    6/ Refit the guard and wheel
    7/ Follow the great video that Mr Grey posted with the exception that you can now drop the forks to full compression rather than just bounce up and down on them.
    8/ Now you can fit the caps.

    This video is a perfect example of understanding how something works not just how nuts and bolts hold things somewhere.
     
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