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Thread: Driveshaft boot orientation

  1. #1
    Registered User ebeeby's Avatar
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    Driveshaft boot orientation

    For a R75/5, the front and back of the drive shaft boot is obvious. Big round hole front, rectangularish hole rearward. How about top and bottom? I can barely read on one end, "GEIRT SEITE" Seite is side, I have no translation for GEIRT.
    Or does it make no difference?

    Also, can someone refresh my memory on the driveshaft fluid content? I seem to remember we removed fill plug, insert small screwdriver and just need to see grease on the blade. I think the actual amount if I were to drain it should be .105 quarts
    1973 R75/5

  2. #2
    Registered User Guenther's Avatar
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    The only thing close to GEIRT that I can come up with is GETRIEBE=TRANSMISSION and the abbreviation could be GETRI(?).

    /Guenther
    2017 F700GS

  3. #3
    Registered User GTRider's Avatar
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    “ GETRIEBE” indicates the side of the boot that goes toward the transmission, “OBEN” indicates the top side of the boot.

    Best,
    DeVern
    DGerber
    1983 R80ST — 1984 R80 G/S-PD — 2004 K1200GT w/Hannigan S/C — 2010 K1300GT — 2018 R1200GS
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  4. #4
    Registered User ebeeby's Avatar
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    Thanks fellas!

    I have an "EN" on the right side of the seem on one of the "tops" - an old mold, it probably is the OBEN with the OB missing on the left side of the seam. And surely the other is the abbreviation of transmission as it is on the round opening end which is the transmission end.

    Eric
    1973 R75/5

  5. #5
    #4869 DennisDarrow's Avatar
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    Hey..You are exactly right about the method of checking fluid level in the driveshaft. For me, I use a broom straw and want a return of 1/16" to 1/8". I use a broom straw or something flexible that will allow me to "go around" the driveshaft, that often a screwdriver won't allow.....Good luck....Dennis

  6. #6
    Registered User cwroady's Avatar
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    If memory serves me, it is 200 cc’s for the driveshaft (with popular opinion being anything over 100cc’s is sufficient) and 150ccs for the FD.
    Chris - 2015 BMW RT / 1973 BMW R75/5 / 1955 BMW R50 - Yard Art - 1968 Hodaka / 1968 Sachs
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  7. #7
    Registered User ebeeby's Avatar
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    I vaguely remembered what a wrestling match those damn boots are. Now I remember clearly!

    My BMW Shop manual says .105 qt which is 99ml
    1973 R75/5

  8. #8
    Dances With Sheep GREGFEELER's Avatar
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    Quote Originally Posted by cwroady View Post
    If memory serves me, it is 200 cc’s for the driveshaft (with popular opinion being anything over 100cc’s is sufficient) and 150ccs for the FD.
    The drive shaft gear oil quantify is 150ml. The small yellow handled screwdriver which came originally in the tool kit will go into the fill plug hole up to it's hilt if done at an angle. You should have some oil on the flat sided part of the tip.
    Greg Feeler
    Ambassador & amateur K-Bike collector, it seems
    1972 R75/5, 1990 K75, 1990 K1, 1992 K75S, 2003 K1200RS

  9. #9
    Registered User cwroady's Avatar
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    Clear as Mud now

    Well .. the last 3 answers gave you 3 different quantities. I apologize for posting something from memory. Ebeeby is closest per my manual, which calls out .2 pint translated to 95ml for the driveshaft and .5pt for the final drive equal to 236ml.

    02B79BCD-2037-47EC-B9C0-BA47AF2E65FD_1_201_a.jpg
    Chris - 2015 BMW RT / 1973 BMW R75/5 / 1955 BMW R50 - Yard Art - 1968 Hodaka / 1968 Sachs
    President SCBMWRC https://scbmwrc.com/ https://www.facebook.com/groups/scbmwrc/
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  10. #10
    Liaison 20774's Avatar
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    I don't know how much goes in the transmission or final drive, but to do the drive train I know I have to buy 2 liters. The transmission is filled until to the level at the bottom of the fill hole and slightly runs out. The final drive is filled to the bottom of the threads viewed down into the fill hole. As for the drive shaft, I think there was a different volume for the early /5s and it went up for the LWB /5 and /6-on. As indicated, 100ml was for SWB /5 but with the longer wheelbase, it went up to 150ml.

    I've never been able to use the technique mentioned by Greg. So, I just drain fully and refill with at least 100ml, maybe a touch more. I suppose I could accurately measure what comes out and replace with the same amount.
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  11. #11
    Dances With Sheep GREGFEELER's Avatar
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    Battle of the Manuals

    Part of the confusion, I believe, is that the rear drive capacity specification for the /5 short wheelbase models was 100ml. However, it was changed to 150ml with the introduction of the long wheelbase models and stayed at that spec for all non-paralever airheads. To the best of my knowledge they never corrected the /5 owner's manuals.

    I have OEM /5, /6, and /7 manuals, and the /5 manual does say ".2" for drive shaft capacity and it's up to you to figure out they mean .2 pints which is 94.6ml, rounded to 100ml. The /6 and /7 manuals both say .15 liter. I guess that from the /5s to the /6s BMW figured out that Americans could work with metric units directly. From my experience you can and should use 150ml in both short and long wheelbase driveshafts.
    Greg Feeler
    Ambassador & amateur K-Bike collector, it seems
    1972 R75/5, 1990 K75, 1990 K1, 1992 K75S, 2003 K1200RS

  12. #12
    Registered User ebeeby's Avatar
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    Thanks again - that make very good sense that the LWB, which mine is, would be 150ml.
    1973 R75/5

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