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Thread: 2013 R1200RT Rear brake inconsistent pedal feel

  1. #1
    Registered User hamboyjohn's Avatar
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    2013 R1200RT Rear brake inconsistent pedal feel

    I picked up my 2013 R1200RT last summer with 6400 miles on it. I just turned over 12k, so I'm working on it

    Since I got it, the rear brake pedal hasn't felt consistent. The front brakes feel perfect - just the rear feels a little soft sometimes and sometimes not. The rear pedal never goes all the way down like it does when bleeding it. but I'd guess it'll go down an inch to inch and a half in normal use on the road.

    When I push on just the rear by itself, it sometimes feels a little soft, but works as well as a rear brake does on a bike. The rear works well enough I can get the ABS to engage without too much effort. I use a little rear brake for low speed maneuvers and practice and it works fine for that too of course. A couple of pumps of the rear pedal will sometimes bring it up a little, sometimes it won't. Sounds like there's air in it, right? The other thing I've noticed is if I'm applying the front lever first and then apply rear pedal, the rear pedal stays higher than when just the rear alone. I assume that has to do with the linked brakes?

    I've replaced fluid with fresh DOT4 and bled out the ABS & both front and rear with a GS911 four times now, and replaced the front and rear pads since I got the bike. All through this, the front brakes are perfect.. the rear still has felt inconsistent. There's no leaks or damage to anything that I can see, and I've never seen any bubbles coming out when I bleed (but maybe I missed them).

    I'll probably take the rear caliper off and inspect & re-bleed again this week, but before I drive myself nuts over this.. is any of this normal on the 2013 RT, or has anybody experienced this or have any tips?
    Thanks
    ___________________________________________
    John on a 2013 R1200RT in North East Ohio #220908

  2. #2
    DennyPink
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    Quote Originally Posted by hamboyjohn View Post
    I picked up my 2013 R1200RT last summer with 6400 miles on it. I just turned over 12k, so I'm working on it

    Since I got it, the rear brake pedal hasn't felt consistent. The front brakes feel perfect - just the rear feels a little soft sometimes and sometimes not. The rear pedal never goes all the way down like it does when bleeding it. but I'd guess it'll go down an inch to inch and a half in normal use on the road.

    When I push on just the rear by itself, it sometimes feels a little soft, but works as well as a rear brake does on a bike. The rear works well enough I can get the ABS to engage without too much effort. I use a little rear brake for low speed maneuvers and practice and it works fine for that too of course. A couple of pumps of the rear pedal will sometimes bring it up a little, sometimes it won't. Sounds like there's air in it, right? The other thing I've noticed is if I'm applying the front lever first and then apply rear pedal, the rear pedal stays higher than when just the rear alone. I assume that has to do with the linked brakes?

    I've replaced fluid with fresh DOT4 and bled out the ABS & both front and rear with a GS911 four times now, and replaced the front and rear pads since I got the bike. All through this, the front brakes are perfect.. the rear still has felt inconsistent. There's no leaks or damage to anything that I can see, and I've never seen any bubbles coming out when I bleed (but maybe I missed them).

    I'll probably take the rear caliper off and inspect & re-bleed again this week, but before I drive myself nuts over this.. is any of this normal on the 2013 RT, or has anybody experienced this or have any tips?
    Thanks
    IF the 2013's still use rear brake caliper slide pins, is it possible the slide pins are rusty/dirty, not allowing the caliper halves to move smoothly and occasionally hanging up? More knowledgeable folks will know. DP

  3. #3
    i should be out riding! wyman.winn's Avatar
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    Quote Originally Posted by DennyPink View Post
    IF the 2013's still use rear brake caliper slide pins, is it possible the slide pins are rusty/dirty, not allowing the caliper halves to move smoothly and occasionally hanging up? More knowledgeable folks will know. DP
    ^^^^ what he said...

    pretty nasty place back there at the rear caliper...clean and lube that pin...makes a world of difference IMO



    oh yeah...13RT with 108000+ miles...
    ~wyman~


    2013 BMW R1200RT - Sassy - Fluid Grey Metallic

  4. #4
    Registered User hamboyjohn's Avatar
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    You guys are right, that was pretty dusty in there. I took it all apart, cleaned it well, and lubed the pin and clips with some silicone spray. Itís definitely better. I still feel some interaction in the pedal when the rear brake is applied and then I add front brake. Not bad or scary, I just feel it. Anyway itís much better with a clean pin.
    Thanks!
    ___________________________________________
    John on a 2013 R1200RT in North East Ohio #220908

  5. #5
    Registered User lkchris's Avatar
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    The RT has integrated brakes, meaning the rear is also applied when using front brake lever.

    Use of the front brake lever probably suffices for 90% of braking requirements. Certainly both brakes should be properly maintained and operating correctly, but it’s difficult to imagine rear pedal feel problems.

    Currently, I can’t recall the last time I’ve used a rear brake pedal and would welcome descriptions of the (must be) really special occasions where this is necessary. Oh, I don’t ride in parking lots or obstacle courses or off road for that matter. Riding since the 1970s fwiw.
    Kent Christensen
    21482
    '12 R1200RT, '02 R1100S

  6. #6
    Registered User bicyclenut's Avatar
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    I ended up replacing rear pads at start of 2020 as the wear on rear pads was pretty uneven, I'm sure partially due to rear pin being pretty pitted and some rust. I had used the dremel tool to polish it up last year and lubed it, but after a year it was back to the same. I ended up buying a new pin and hardware and it looks and works much better. I do use my rear brake often for slow speed turns, usually just before coming to a stop and at stoplights.

    Quote Originally Posted by hamboyjohn View Post
    You guys are right, that was pretty dusty in there. I took it all apart, cleaned it well, and lubed the pin and clips with some silicone spray. Itís definitely better. I still feel some interaction in the pedal when the rear brake is applied and then I add front brake. Not bad or scary, I just feel it. Anyway itís much better with a clean pin.
    Thanks!
    2010 BMW R1200RT
    2014 BMW C650GT (sold)
    MOA # 208387

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