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Thread: Another BRAKE related post..."Search" tool was inconclusive...

  1. #1
    John D'oh
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    Another BRAKE related post..."Search" tool was inconclusive...

    I checked back through the posts and found a note about the brake disc's on the
    Brembo equipped dual disc bikes (an 83 airhead in this case). The post indicated that the
    ‘«£Brembo disc's run in a different plane" from the ATE disc's. Since the disc's themselves
    appear to be the same, the later style must use a different disc carrier from the one used in
    conjunction with the earlier ATE system. Knowing that the cast wheels will interchange
    between a 78 and an 83 I am making the assumption that one must have both discs made
    for the Brembo front brake systems in order to update a 78 R100 to a Brembo front end
    and that earlier ATE disc's will not interchange. I‘«÷ve dealt with this one time before and
    I don‘«÷t want to rely on my memory. The parts are expensive and stopping is too mportant
    John D'oh

  2. #2
    Grammarian no, Rider yes ISAMEMON's Avatar
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    I was told it was a different slider that kept us form using the Rambos on the early bikes
    could be wrong
    would not be the first time
    just ask my wife

  3. #3
    BMW parts fiche shows the same brake disc, part number 34 11 1 236 566, for all models 1974 - on.

    What you can't do is use wire spoke wheels with Brembos.....

  4. #4
    The Brembos mount ahead of the fork leg; the Ate calipers mount behind the fork leg. The Ate calipers attach via a eccentric pivot bolt; the Brembos attach with two regular bolts.

  5. #5
    shire2000
    Guest
    Swall,
    So if I take the Brembos on my 1981 R100RT and swing the fork legs around so that the calipers are out front, will I get better braking?
    They came from the factory with the caliper's hanging out the back of the leg, but if changing the legs from side to side and moving the calipers to the front will give better performance, we just may have come across the cheapest upgrade one could find.


  6. #6
    VANZEN
    Guest

    give me a brake

    The 5 hole carriers (and rotors) used on the ATE and Brembo equipped forks are the same, as is rotor spacing (distance between rotor centers on twin disk)

    Forks fitted with F08 Brembos have different sliders AND different internal damping parts than the ATE equipped forks, making a 'slider only' swap impractical.
    Consequently, if one wants to replace the ATEs with the later Brembo F08s – it is much simpler to swap the entire forks.

    A flake can be fitted to ATE forks ... but fitting most early wire wheels to an F08 Brembo fork will NOT work as the calipers interfere with the spokes.
    However, a narrow "3-rib" hub from an R80ST or GS allows the use of a wire wheel on the dual F08 Brembo forks.

    Some BMW models had the F08s in front and some had them behind the sliders. I can't imagine that stopping ability is altered in any appreciable way as a result of the change.
    Last edited by vanzen; 04-08-2008 at 03:19 AM.

  7. #7
    John D'oh
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    I believe that's the answer to my question...

    ...I remember now that it was the 77 spoke front wheel I tried to use with the
    Brembo front end that was the problem, not the discs. I had an R80GS with the
    21" wire wheel and figured I could get wire wheels to fit my 83 R100. Turned out
    I had to use the Flakes because of the problem you talked about...I found out
    right away the calipers didn't clear the wire spokes. The devels in the details.

    I do appreciate all the feedback on this.
    John D'oh

  8. #8
    sumran
    Guest


    Imagine how much I wouldn't know if I rode a complicated motorcycle!

  9. #9
    John D'oh
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    Quote Originally Posted by sumran View Post


    Imagine how much I wouldn't know if I rode a complicated motorcycle!
    ...and a particularly sobering thought is that there are folks out there who have forgotten more than I'll ever know about these airhead BMW's...
    John D'oh

  10. #10
    #4869 DennisDarrow's Avatar
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    Thanks for that Paul...............I am surely not a primo example; but instead the tip of the iceberg of folks out there that actually do not even know that this format exists nor care to participate...................

    lolololol..............It would seem that the knowledge and experience that old age and experience bring blended with leaving behind a legacy to those left after them is often shunned due to the ignorance of the uninformed and an attitude of "I know everything"....................

    For me, I totally welcome a refresher on what has been mentally filed away; but cant remember what drawer, CD, or floppy it was put on..........

    God Bless................Dennis

  11. #11
    VANZEN
    Guest

    old age

    Quote Originally Posted by DennisDarrow View Post
    ...For me, I totally welcome a refresher on what has been mentally filed away; but cant remember what drawer, CD, or floppy it was put on..........

    God Bless................Dennis
    LOL. ain't it the truth.
    (the hard-drive is top notch ... it's the software that gives me problems)

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