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Thread: Does anyone know ?? Rear Drive Compatibility

  1. #1
    DBLUPPR snookers's Avatar
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    Does anyone know ?? Rear Drive Compatibility

    Does anyone know if a rear drive from a 2006 BMW K1200 LT/RS, will fit on a 2005 K1200S. Looking at having a spare unit on hand.
    2000 R1100RT , 2005 K1200S w/hack
    Niagara BMW Riders #298 BMWMCO #45
    "Always look on the bright side of life" (Monte Python)

  2. #2
    Liaison 20774's Avatar
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    I can't help much with the question, although the part numbers between the two are different.

    I'm going to edit the title in order to add some context to the thread so people have a general idea of what is being asked about!
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    DBLUPPR snookers's Avatar
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    I'm interested in knowing if the rear drive unit would fit, as I'd be using it with a sidecar rig and really don't care if the bike does a 150 miles an hour
    2000 R1100RT , 2005 K1200S w/hack
    Niagara BMW Riders #298 BMWMCO #45
    "Always look on the bright side of life" (Monte Python)

  4. #4
    If the illustrations in the parts fiche are correct the answer is no. The K1200LT uses the same final drive style as the earlier paralever equipped bikes, but the K1200S appears to have the later design "big hole" final drive with a large hole side-to-side through the center of the final drive. The former has the paralever strut below the final drive and the latter has that strut above the final drive.

    Can an owner of each of these models please verify what their bike has please?
    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://web.bigbend.net/~glaves/

  5. #5
    Registered User GTRider's Avatar
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    If the model in question is actually the K1200R Sport, that bike uses the big-hole style FD in a 32:1 configuration, while the K1200S also uses the big-hole FD but in 31:11 ratio. There could also be differences due to ABS1/ABS2 implementations. The diagrams in the parts fiche are useful for finding which bits BMW sells today to fit those bikes, but can’t really answer questions like this one. This needs input from owners of the respective machines and/or a service tech who has lots of hands-on with these two bikes. And K1200R Sport production was pretty limited IIRC...

    best,
    DeVern
    DGerber
    1983 R80ST — 1984 R80 G/S-PD — 2004 K1200GT w/Hannigan S/C — 2010 K1300GT — 2018 R1200GS
    BMWMOA#52184, AMA#271542, IBA#138

  6. #6
    Quote Originally Posted by GTRider View Post
    If the model in question is actually the K1200R Sport, that bike uses the big-hole style FD in a 32:1 configuration, while the K1200S also uses the big-hole FD but in 31:11 ratio. There could also be differences due to ABS1/ABS2 implementations. The diagrams in the parts fiche are useful for finding which bits BMW sells today to fit those bikes, but can’t really answer questions like this one. This needs input from owners of the respective machines and/or a service tech who has lots of hands-on with these two bikes. And K1200R Sport production was pretty limited IIRC...

    best,
    DeVern
    DeVern has verified that the K1200S has a big hole drive. Now will some former Curve Cowboy please verify that the K1200LT does not? Please?
    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://web.bigbend.net/~glaves/

  7. #7
    Registered User wvandennoort's Avatar
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    My 2000 Lt does NOT have the big hole.
    Bill Van den Noort
    2000 K1200LT
    2017 R1200RT
    MOA# 96083

  8. #8
    Registered User GTRider's Avatar
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    Well, I’m cornfused so let me get my head straight.

    K1200RS: https://www.motorcyclespecs.co.za/mo...200rs%2001.htm

    K1200LT: https://www.motorcyclespecs.co.za/mo...200lt%2006.htm

    As Paul pointed out, both the above machines have the older-style, “non-big-hole” FD. They also have the swingarm on the RH side of the bike and FD pivot concentric with the driveshaft u-joint. Personally, I don’t see any interchangeability between these and the bikes listed below, both of which have the big-hole FD with swingarm on the LH side of the bike and the FD pivot below the centerline of the driveshaft.

    K1200R Sport: https://www.motorcyclespecs.co.za/mo...sport%2007.htm

    K1200S: https://www.motorcyclespecs.co.za/mo...1200s%2005.htm

    I would strongly suspect the FD units from the last two bikes to have some interchangeability, and they do have different FD ratios according to RealOEM, but I can’t vouch for that or for ABS compatibility. Owners to the white phone, please.

    BMW hasn’t made it easy to track models, doing things like producing a K1200GT in both brick-k and wedge-k formats. And, I seem to remember some of the literature of the day referring to the K1200R Sport as “K1200RS or K1200R-S”. Still easier to sort out than the alphabet soup that H-D uses, tho-just sayin’...

    Best,
    DeVern
    Last edited by GTRider; 10-08-2019 at 01:25 AM. Reason: Fix GT/RS notations
    DGerber
    1983 R80ST — 1984 R80 G/S-PD — 2004 K1200GT w/Hannigan S/C — 2010 K1300GT — 2018 R1200GS
    BMWMOA#52184, AMA#271542, IBA#138

  9. #9
    Left Coast Rider
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    Quote Originally Posted by snookers View Post
    Does anyone know if a rear drive from a 2006 BMW K1200 LT/RS, will fit on a 2005 K1200S. Looking at having a spare unit on hand.
    Short answer - no. The K1200LT/RS used the brick motor and the final drive (notice I didn't say differential, Paul ) was not the big hole variety. Also, it was located on the right side of the bike - opposite side to the K1200S.

    Question - Why do you want a spare? I don't think the big hole FDs have a history of failure.

  10. #10
    DBLUPPR snookers's Avatar
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    BC1100S;1180984
    Question - Why do you want a spare? I don't think the big hole FDs have a history of failure.
    I have a 2005 K1200S and recently replaced the rear drive because of a rear drive bearing failure on my sidecar rig. The failure resulted in taking out the bevel gear as well, hence the replacement. Both rear drive units below have the large hole in the rear drive housing. I suspect, correct me if I'm wrong, that the difference in the drives is the gearing. Because I'm running the K1200S with a sidecar, and really don't care about the high speed this bike is capable of, I'm wondering should the rear drive from the K1200 LT/RS fit on the "S" bike, might it be a better choice as a drive unit for my application.
    And BC1100S, I only want a spare unit sitting in the garage as a spare, and am not in a hurry to attain one but wanting to do some research with the vast resources available to me in this forum.
    And I thank all those who have chimed in so far


    2006 BMW K1200R K1200S K1300S Right Angle Final Drive Axle p/n 33 11 8 530 085

    2006 BMW K1200 LT/RS Right Angle Gearbox Final Drive Rear Axle p/n 33117661909
    2000 R1100RT , 2005 K1200S w/hack
    Niagara BMW Riders #298 BMWMCO #45
    "Always look on the bright side of life" (Monte Python)

  11. #11
    Debbie's Servant Lee's Avatar
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    As BC1100S said, it will not work.
    The LT/RS final drive is on the right side of the bike.
    The LT/RS torque arm id on the bottom.
    The LT/RS rear brake mounts on top.

    IMG_0036.jpg

    IMG_0112.jpg
    Lee
    2016 R1200RS
    MOA # 30878
    Past BMW Bikes: 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  12. #12
    Left Coast Rider
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  13. #13
    DBLUPPR snookers's Avatar
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    Quote Originally Posted by BC1100S View Post

    Yes it would, I seen that ad, although I think the asking price is to high

    The link below is the one I was questioning about


    https://www.ebay.ca/itm/2006-BMW-K12...9/174051103095
    2000 R1100RT , 2005 K1200S w/hack
    Niagara BMW Riders #298 BMWMCO #45
    "Always look on the bright side of life" (Monte Python)

  14. #14
    Debbie's Servant Lee's Avatar
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    Quote Originally Posted by snookers View Post
    Yes it would, I seen that ad, although I think the asking price is to high

    The link below is the one I was questioning about


    https://www.ebay.ca/itm/2006-BMW-K12...9/174051103095
    The one in the ad is not a LT/RS final drive.

    Just thought of something. You may want to look for one that has a drain plug in the bottom.
    I don't know what year they started using a drain plug.
    Lee
    2016 R1200RS
    MOA # 30878
    Past BMW Bikes: 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  15. #15
    Left Coast Rider
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    Quote Originally Posted by snookers View Post
    The link below is the one I was questioning about


    https://www.ebay.ca/itm/2006-BMW-K12...9/174051103095
    Nice price if its as advertised! It certainly appears that it will fit your 1200S. I'll venture a guess that one should work.

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