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Thread: r1100rt and eunichs

  1. #1
    Registered User Bmandiego's Avatar
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    r1100rt and eunichs

    I've been noticing lately that the seat on my r1100rt sometimes makes the decision that I should be a eunich.
    Since this bike is used, I don't know what they padded the seat with when it was recovered.
    But still....
    Anyone else have this problem?
    Is there some fix that will not cost mucho dinero?
    Thanks for the help, I've never made a good soprano.
    2000 R1100RT-P

  2. #2
    Day Dreaming ... happy wanderer's Avatar
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    1100RT seats are not level and as such they cause you to slide forward until pain informs you that you've gone far enough. They are on a forward incline.

    This can be fixed by getting a different seat which is costly but effective or you can place some material under the seat adjuster jack to increase the height of the front of the seat a little.

    I have a set of seat jacks in my spare parts somewhere that add about a 1/4" of height to the front of the seat and they made a noticeable difference. They are made of poly propylene I think or some soft white plastic anyway.

    I also removed the stock rubber bumpers from the back of the seat and found some same diameter thick rubber hose material that I used to lower the back of the seat about a 1/4" as well and both together leveled my seat out which stopped this problem pretty effectively.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  3. #3
    Nickname: Droid
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    Must be some strange riding position that BMW engineers seem to favor, this sliding into the front of the seat issue. My 94 RS had the exact same issue when I first started riding it. Back then I did much the same thing mentioned above.

    I have noticed this on most all non-airhead BMWs I have ridden. The German engineers perhaps set up the seat for riding at Autobahn speeds above 160k and figure the rest of the world can just live with it.

  4. #4
    Registered User Bmandiego's Avatar
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    Thanks guys.
    2000 R1100RT-P

  5. #5
    Registered User arthurdent's Avatar
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    so is this what has been referred to as the dreaded "beemer boner"? I'm going to try Seating Concepts recover. biggest beef I have with my 1150gs is sliding forward like that and the SC eliminates a lot of the slope.

  6. #6
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    Quote Originally Posted by arthurdent View Post
    so is this what has been referred to as the dreaded "beemer boner"? I'm going to try Seating Concepts recover. biggest beef I have with my 1150gs is sliding forward like that and the SC eliminates a lot of the slope.
    Seat Concepts is a big topic over on the F650.com website right now.
    '03 R1150R, '03 F650GS, '97DR200SE,'78 Honda CT-90, '77Honda CT-90

  7. #7
    MOA #24991 Pauls1150's Avatar
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    To maintain that manly basso profundo, fab two spacers like this to install under the forward seat mounts before dropping the bucks on a custom seat.
    Material can be anything that doesn't rust or rot.
    Yes you'll need four slightly longer screws.
    You can also trim the two big rear bumpers down by about 1/8" or so (the "dome" section) - more than that, and the seat will rock back and forth, and mating the rear section becomes iffy.
    Attached Images Attached Images

  8. #8
    Registered User Bmandiego's Avatar
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    Thanks Paul!
    Nice diagram.
    I did put some washers under the seat mount today, They were thin, because I did not have any longer screws. It did make a difference, not sure if it's a good or bad thing yet. I'll have to get some longer screws and have another go at it. I suspect the seat also has the wrong type of foam as well. It's a bit too firm.
    I think if I can get this seat worked out, it may solve a few problems I've been having.
    Anyone have a spare R1100RT Seat hanging around?
    2000 R1100RT-P

  9. #9
    Registered User Bmandiego's Avatar
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    Some guy on ebay had a set of these for $20.00 with the screws included.
    Shaweeet.
    I had been having problems with seat pressure and hand numbness/pain in the clutch hand.
    Here's what I modified:
    1. Bought the neoprene grip covers
    2. Bought and installed a pair of 3/8 inch aluminum (aluminium for Brits!) seat mount spacers.
    3. Bought a used r1100rt seat for $70.00 on ebay. Mine had been reupholstered with some really dense foam, so I cannot stay comfortable and retain my masculinity.
    These changes have made the bike much more rideable and comfortable. I still get monkey butt after a couple hours on the bike, but it is much much much better.
    ...I'm going to try some underarmour boxers next.
    Thanks for your posts guys!
    2000 R1100RT-P

  10. #10
    Day Dreaming ... happy wanderer's Avatar
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    Monkey Butt? The fix is not cheap but it works. These are pretty great riding shorts.

    http://www.ldcomfort.com/index.html
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  11. #11
    Registered User redsledrider's Avatar
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    Here is a pic of my seat after RICH's seat folks fixed it.
    http://www.bmwmoa.org/forum/showthread.php?t=60406 it was for the shocks but you can see the shape of the seat. No more sliding forward and a bigger butt pan, so no more riding a saw horse.
    84 Honda 700S Nighthawk
    95 R1100RS

  12. #12
    Registered User Bmandiego's Avatar
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    Quote Originally Posted by Happy Wanderer View Post
    Monkey Butt? The fix is not cheap but it works. These are pretty great riding shorts.

    http://www.ldcomfort.com/index.html
    Thank you!
    I've bookmarked the site. The clothes look awesome!
    2000 R1100RT-P

  13. #13
    Nickname: Droid
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    Nope, I have tried a wide variety of "riding shorts" of varying "technology" and price, and not a single one does what they advertise and what I need. In every single case, swamp-butt sets in.

    Nothing,....nothing works for me but good ol' airflow under the butt. Cheapest alternative is a bead-seat, but I don't care for the looks. Other end of the spectrum is the Kontour seat system, at about $700 minimum to fit my RS. A great, proven idea but just to pricey when I plan to move on to a different R-bike in a few years. I'll spend the money for a Kontour seat on that bike.

    For now, my own custom built/home built airflow seat is working better than the stock seat I built it from. I'll ride it for now until I finally move up to a much newer R-bike with a Kontour seat.

  14. #14
    beemerFROG derost's Avatar
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    +1 on raising the front.
    Go to a woodworking store and get a piece of plastic used for making jigs. Easy to cut and shape, durable, wont degrade, and waterproof. Best stuff to use.

    BTW, I used the same stuff to make non-maring grips for my HF tire changer... works like a charm.
    -Ride Safe & Avoid Anyone On The Phone-
    **2000 R1100RT (Bullfrog), 1976 R90/6 (Tadpole)**
    beemerFROG a.k.a. Douglas E. Rost
    MotoFrog.net -- Black Frog Marketing

  15. #15
    Day Dreaming ... happy wanderer's Avatar
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    Quote Originally Posted by ANDYVH View Post
    Nope, I have tried a wide variety of "riding shorts" of varying "technology" and price, and not a single one does what they advertise and what I need. In every single case, swamp-butt sets in.

    Nothing,....nothing works for me but good ol' airflow under the butt. Cheapest alternative is a bead-seat, but I don't care for the looks. Other end of the spectrum is the Kontour seat system, at about $700 minimum to fit my RS. A great, proven idea but just to pricey when I plan to move on to a different R-bike in a few years. I'll spend the money for a Kontour seat on that bike.

    For now, my own custom built/home built airflow seat is working better than the stock seat I built it from. I'll ride it for now until I finally move up to a much newer R-bike with a Kontour seat.
    OK so that's one vote against. But there are 42 testimonials on the site and you can count me as one more that say they do help move moisture away from your body and that is a good thing...

    I stand up on my pegs at 60mph once in a while to get airflow as well.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

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