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Thread: '95 k75

  1. #1
    JMartin
    Join Date
    Nov 2006
    Location
    Denver, Colorado
    Posts
    2

    Unhappy '95 k75

    Recently purchased a beautiful '95 K75 with approx. 28K miles and ABS (which I understand is standard on this model.) My 4th BMW. Getting used to the brake operation. Rear brake doesn't seem to have much (any?) stopping power when used without the front brake. I am not a heavy rear brake user so I haven't noticed the issue very frequently (also haven't had time to put many miles on it so far). Should I expect to have to use both front and rear brakes simultaneously? Brake fluid was recently changed during a major service at a dealer. Rear brake seem to operate properly during a stationary test on the center stand. Getting ready for a quick 3-day trip around Colorado so any insight will be appreciated. Thanks!

  2. #2
    Benchwrenching PGlaves's Avatar
    Join Date
    Oct 2003
    Location
    "Big Bend" TX
    Posts
    8,715
    Conventional wisdom is that breaking effectiveness is 70% front and 30% rear, or even 80% front and 20% rear. This is acutely true on the K75.

    The rear brake is most useful as a parking lot brake or for other slow speed maneuvers. It also adds that extra small percentage during normal braking.

    But to actually make the bike stop quickly front brake is mandatory and primary.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://www.bigbend.net/users/glaves

  3. #3
    Registered User
    Join Date
    Oct 2008
    Location
    Laurel, MD
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    569
    I have always felt the opposite about the rear brake on my non-abs 1994 K75/2. I know that physics dictates that the front brakes provide the large majority of braking power, and even more-so when the brakes are applied (weight shifts forward) but my rear brakes have always felt very strong. Compared to my other bikes, I end up using the rear brakes much more often than usual. so much so that the pads wear down far faster than the fronts.

    I have recently installed a set of 4-pot K1100 calipers in the front along side of a 20mm MC so I have a feeling that my bias toward the rear brake will change.
    1994 K75/2

    Owner/Designer, LampOneDesigns.com

  4. #4
    JMartin
    Join Date
    Nov 2006
    Location
    Denver, Colorado
    Posts
    2

    '95 K75 - follow-up regarding Rear Braking power

    Thank you for your replies to my question regarding the rear braking power on the K75. Much appreciated!

    Jim Martin
    Denver, Colorado

  5. #5
    Pascal Girard fpgirard's Avatar
    Join Date
    Jul 2009
    Location
    Bethesda MD
    Posts
    25
    i regularly practice my emergency stops on the k75 - good thing as if my initial attempts generally wind up skidding the rear tire but after a few tries, i re-learn the balance of front/back braking - Paul's right - 80% front...... there's a reason for 2 discs up there.

    p
    -- 1995 Dark Blue K75 (sold to a friend)
    -- 2006 Vespa GTSie (sold)
    -- 2003 R1150R - gorgeous ride.....

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