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Thread: Wanted - Used Front Rotors

  1. #1
    apriliaforum expert angrybob's Avatar
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    Wanted - Used Front Rotors

    Condition does not matter (warped, warranty return, etc. OK). I am working on a side project and need a set of cheap front rotors if anyone has them...a single rotor is actually preferred.

    Drop me a note at angrybob@cox.net if you have what I'm looking for.

    Thanks
    AB the anti-post-whore
    '06 YZ450F

    "You say that it is your custom to burn widows. Very well. We also have a custom: when men burn a woman alive we tie a rope around their necks and hang them. Build your funeral pyre; beside it, my carpenters will build a gallows. You may follow your custom. And then we will follow ours." - Sir Charles Napier

    "Good people sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf."
    - George Orwell

  2. #2
    apriliaforum expert angrybob's Avatar
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    So here's the deal...

    I am looking for a rotor to be disassembled. I need to get the measurements from the semi-float button. I have a friend who owns a screw/bolt/rivet machining company locally here in Phoenix.

    What I want to do is make a set of full-floating buttons out of the same stainless material. The idea is to make the stock rotors full-floating w/o spending a boatload of cash on aftermarket ones.

    I know that cast iron offers a better heat soak than the stock stainless material, but I don't really want to spend the money for new ones when mine are perfect. Second, it will probably <!> eliminate the semifloat button problem of 'sticking' - the cause of much of the brake vibration.

    The difference...The current Brembo buttons are finish-machined (turned). My firend's outfit does cold rolling. We reviewed the tolerances on some estimate dimensions and the largest was .005" or .1mm and that was in total length on the button. That should not cause a problem. I am a brake system engineer for the automotive world and have a pretty damn good understanding of rotor/caliper interface and design GD&T.

    The idea is to use a button with a groove machined in it for a snap ring. In between the snap ring and the rotor carrier will be a stainless washer...like on the current rotor.

    It looks like I can sell these for about $40 or so for a 'kit' of 16 buttons, washers, & snap rings. I have to cover a $600 tooling cost plus materials, etc. Yes, to do that there is a few bucks for me involved. Don't know how much yet...don't really care as I'm keeping my day job.

    Of course I am going to be the guinea pig and fit these on my bike first. I have owned Brembo, AP, & Ferodo full-floating rotors and don't really see a problem. This design is very similar to the AP style except a simpler fastener - snap ring versus a coil-type retainer.

    Is there any interest out there for this? I need to double check the 00.5 & older design, but I think the buttons are common so it should work for all 99-02 models. Dunno about the '03. Dunno shit about the '04. And all of the Ducati 748/916/996/998 models as well.

    Let me know here or at angrybob@cox.net
    AB the anti-post-whore
    '06 YZ450F

    "You say that it is your custom to burn widows. Very well. We also have a custom: when men burn a woman alive we tie a rope around their necks and hang them. Build your funeral pyre; beside it, my carpenters will build a gallows. You may follow your custom. And then we will follow ours." - Sir Charles Napier

    "Good people sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf."
    - George Orwell

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