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Thread: R1150RT ABS issues?

  1. #1
    What's that noise...? basketcase's Avatar
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    R1150RT ABS issues?

    I am pursuing the search for an oilhead and today I spoke with a fellow who has an R1150RT that he might sell.

    He commented that when stopped the ABS emits a whining sound, and that the local BMW m/c tech told him "they all do that."

    I've owned two K bikes in years past with ABS. Both of them clunked on takeoff when the modulator set, but none of them whined.

    So my question is, "what about the statement that the R1150 abs squeals or whines?

    Should I accept it as fact, or run the other way?
    '98 BMW Z3 Roadster, '00 R1100RT

    If you insist on exercising a right to burn our flag, first be so kind as to wrap yourself in it and then douse yourself with gasoline just before you strike the match.

  2. #2
    2004 1150RT deltaJim47's Avatar
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    Whining ABS

    Yep, "they all do that" is correct. You will hear them referred to as "Whizzy Brakes or Whizzy Bikes". Nothing to worry about unless it is abnormally loud when brakes are applied.
    Last edited by deltaJim47; 12-10-2013 at 02:09 AM. Reason: additions
    "Don't worry 'bout the mules boy, just load the wagon!"

  3. #3
    Registered User lkchris's Avatar
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    The difference is that the brakes on the 1150 are linked, i.e. front lever operates both front and rear brakes. Implementation involves an electric pump. You'll want to be careful first time you push the bike somewhere, as it feels like you have no brakes at all unless ignition switch is on.

    Your old Ks had none of this.
    Kent Christensen
    21482
    '12 R1200RT, '02 R1100S, '84 R80G/S

  4. #4
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    You do hear a high RPM pump motor running, it does not sound like a squeal to me, more a slow vacuum cleaner sound. If you press the brakes harder it will load the motor and you will hear it slow down slightly.

    If you still have the original black rubber lines, plan to change them at the earliest chance. They will fail.

    The system requires tank removal to change the fluid and bleed the system. This is a good idea to keep fresh dry fluid with plenty of corrosion inhibitors in the system. This is true for all brake systems!!!!

    To do it yourself I use the following instructions

    http://advwisdom.hogranch.com/Wisdom/service_abs3.pdf

    This looks hard, but really it is easy, the instructions are wonderful. Hardest part is getting the electric connection unplugged.

    The ministan tool is nice to have, beemerboneyard sells at fair price.

    I bought Spieglar hoses they fit perfectly. I have no direct experience but any other brand should be fine, it is not rocket science.

    I buy fresh soft aquarium air hose, and use my heat gun and a tapered punch to swell one end to fit the bleeders, this prevents mess.

    Also if you still have the black plastic disconnects, get the kit from beemerboneyard and replace them and the hose. It is a good time to do in internal fuel filter too. If that hose is bad, you will want to replace it also.

    Have fun, this bike rides and handles in ways that take a while to appreciate. The boosted brakes can be very touchy at low speeds. I use only one finger. Do not turn even a tiny amount at low speeds until you are fully familiar with them. IF you ever need to panic stop, then they are the best thing ever. Work your way up carefully, and prepare to be amazed.

    Rod

  5. #5
    Registered User froggy's Avatar
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    Quote Originally Posted by ragtoplvr View Post
    You do hear a high RPM pump motor running, it does not sound like a squeal to me, more a slow vacuum cleaner sound. If you press the brakes harder it will load the motor and you will hear it slow down slightly.

    If you still have the original black rubber lines, plan to change them at the earliest chance. They will fail.

    The system requires tank removal to change the fluid and bleed the system. This is a good idea to keep fresh dry fluid with plenty of corrosion inhibitors in the system. This is true for all brake systems!!!!

    To do it yourself I use the following instructions

    http://advwisdom.hogranch.com/Wisdom/service_abs3.pdf

    This looks hard, but really it is easy, the instructions are wonderful. Hardest part is getting the electric connection unplugged.

    The ministan tool is nice to have, beemerboneyard sells at fair price.

    I bought Spieglar hoses they fit perfectly. I have no direct experience but any other brand should be fine, it is not rocket science.

    I buy fresh soft aquarium air hose, and use my heat gun and a tapered punch to swell one end to fit the bleeders, this prevents mess.

    Also if you still have the black plastic disconnects, get the kit from beemerboneyard and replace them and the hose. It is a good time to do in internal fuel filter too. If that hose is bad, you will want to replace it also.

    Have fun, this bike rides and handles in ways that take a while to appreciate. The boosted brakes can be very touchy at low speeds. I use only one finger. Do not turn even a tiny amount at low speeds until you are fully familiar with them. IF you ever need to panic stop, then they are the best thing ever. Work your way up carefully, and prepare to be amazed.

    Rod
    Wish I had read this last bit when I 1st got my 02 RT. Had never dropped a bike before (crashed yes) when applying brakes on slow turn. Once you get used to them you don't want to go back to plane brakes.
    We drove all this way for a DEAD END ! My son!!!

    02 Silver RT1150 My 1st BMW Bike
    Craig

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