bmw r80 mono replacement caliper

Discussion in 'Airheads' started by villageidiot, Oct 7, 2012.

  1. villageidiot

    villageidiot Long timer

    Joined:
    Apr 29, 2010
    Oddometer:
    2,459
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    Orange County, CA
    ive searched and searched....... i know there is a place that sells the oem brembo calipers much much cheaper than bmw,

    i can not find it.

    what i am experiencing......

    i just changed the front brake like to a braided stainless one i had made. when bleeding the brakes, i noticed a small bit of fluid on the line where the caliper halves are bolted together. when i hold pressure on the brake, the little bit of fluid grows, then when i let off it contracts.

    i am not sure if its dribbled on top and what i am seeing is it go into and out of the caliper halves when the pressure flexes them, or if its seeping out and sucking back in. i did not experience any fluid loss, and the lever holds firm if i hold it for a minute or so, i am just thinking at almost 30yrs, it could be time for new calipers

    thanks for the help
    #1
  2. R100RT Mark

    R100RT Mark Been here awhile

    Joined:
    Feb 19, 2011
    Oddometer:
    310
    Location:
    Georgia, USA
    Motobins in the UK www.motobins.co.uk sells a replacement for the Brembo calipers that is manufactured under the GRIMECA brand at £85 each, approx. $140 (Capital Cycle also offer the part at $220 each). Rebuilding yours with an overhaul kit, $20 from various sources, including Capital Cycle www.capitalcycle.com, is something to consider if the caliper is basically sound.
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    #2
  3. boxerboy81

    boxerboy81 Stay Horizontal

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    Jul 22, 2009
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    #3
  4. bmwrench

    bmwrench Long timer

    Joined:
    Nov 10, 2006
    Oddometer:
    2,537
    Brake fluid almost always gets spilled on the caliper when installing a new hose, and makes the caliper appear to leak. Give the caliper a good cleaning with soap and water and see if your leak goes away.

    With a braided hose and a solid master cylinder, you can apply far more pressure than with a rubber one. You can see the caliper and fork slider twisting if you pull hard on the lever, and this prssure can also make the caliper flex, making spilled fluid appear from the caliper joint.
    #4
  5. Boxer Metal

    Boxer Metal Mad Scientist

    Joined:
    Nov 3, 2003
    Oddometer:
    3,589
    Location:
    Chico, California
    Rebuild it. It's easier than an oil change.
    #5
  6. villageidiot

    villageidiot Long timer

    Joined:
    Apr 29, 2010
    Oddometer:
    2,459
    Location:
    Orange County, CA
    this is what happened. its all good now, just kinda headtricked me.

    i especially don't like neglecting brakes of all things. but its A okay!
    #6