HELP!!!! I need a front brake upgrade for R100GS PD

Discussion in 'Old's Cool' started by bykpimp, Feb 22, 2007.

  1. Stagehand

    Stagehand Imperfectionist

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    #41
  2. opposedcyljunkie

    opposedcyljunkie Heavyweight Boxer

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    thanks! :D
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  3. Stagehand

    Stagehand Imperfectionist

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    :thumb
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  4. Stagehand

    Stagehand Imperfectionist

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    "BUT DO THEY BRAKE BETTER?"


    everytime i feel like the PD's brake suck, I just ride the R60 around the block. It produces an instantly noticeable better feel and braking power in the R100's brakes.

    :D

    that looks like a pretty simple swap. I hate the thought of removing material from such sensitive areas, though... stock R100 brembos are 2-pot? Is that one pot from each side- meaning 1 in-board and 1 outboard?
    Did you keep the fork assembled to do the machining? Sounds like no- you mention a vice.

    ok-- regarding keeping a caliper centered on a disc-- Can the caliper pistons be at differing degrees of extention? I mean: can one piston be farther out then the other, and the thing still operate? It seems like it would, once the fluid takes up the space behind it. Shouldnt matter, I think. reason i'm asking is- as long as there is enough piston travel, could you keep an uncentered caliper and Not remove mounting boss material?
    As long as both sides of the caliper shared a resevoir, they shoud both feel the same force from the master cylinder.
    I'm picturing just room enough for one pad to fit between a closed piston and the disc on one side, and the other piston being opened a few mils?
    #44
  5. Lornce

    Lornce Lost In Place

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    material was removed from the caliper boss's, not the forks. the forks didn't leave the bike.

    non-centred caliper will work but eventually you will have problems as pistons on one side are overextended from the bore and possibly damage their seal and cause corrosion damage. ie: they're not designed to extend asymetrically.
    #45
  6. Stagehand

    Stagehand Imperfectionist

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    Oh-- duh. I missed that part, somehow. thx.

    Cool-- Its good to know they can work that way, up to a point. I realize they must to a degree, naturally... just confirming my suspicions of hydraulics and brake actions. thanks again.
    #46
  7. Bernd Bauer

    Bernd Bauer Adventurer

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    Hi,
    please measure carefully, because if the offset is to big then there is not enough room for the brake pad.

    However, if you don't want to modify the caliper then you can also move the disc my milling the material of the hub.
    If this is a no go for you too, then you cann still order the 320mm disc from HE Motorradtechnik.

    [​IMG]

    Because they use a spacer between the hub and the disc. When you tell them that you are going to use the disc together with the 4-pot Brembo then they will send you a smaller spacer. This way you get a plug&play solution.

    Regards

    Bernd
    #47
  8. Marrakesh Red

    Marrakesh Red Banned

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    Hello Bernd,

    Nice set up. How does it work?
    Marcos
    #48
  9. Beemerboff

    Beemerboff Long timer

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    For a start good pads make a big difference , either Brembos own double H pads if you can find them or the galfer greens double G s which are almost as good.
    Dont forget to give the disk a good scuffing between pads , back to bare metal.

    And check that you have the correct master cylinder too - smaller is better yet some folks just dont have the brain to work it out and go the other way and are left with a week, wooden stopper.
    That is the main advaantage of the four piston caliper , you get much more mechanical advantage, but you can get the same with a much simpler swap to a smaller master cylinder.
    #49