Interesting GS pic...

Discussion in 'Airheads' started by igormortis, Dec 10, 2012.

  1. igormortis

    igormortis Cafe Reise

    Joined:
    Dec 22, 2006
    Oddometer:
    1,478
    Location:
    London
    Anybody know about this particular bike? At first glance it looks standard, but a few interesting bits are lurking...

    [​IMG]

    - forks (is that a G/S bottom clamp?)
    - wheel hub
    - brake rotor
    - passenger footpeg mount
    - torque arm

    Anything else? Aside from missing springs, the center stand looks different to me also.

    Pic says 1987 - prototype maybe?
    #1
  2. Airhead Wrangler

    Airhead Wrangler Adios Mexico

    Joined:
    Mar 4, 2008
    Oddometer:
    6,759
    Location:
    Back in Seattle, FINALLY
    You missed the drain and fill plugs on the swingarm. Yes, the paralever was originally designed to be a wet swingarm. Forks look to be Marzocchi M1s. Front hub appears to be machined rather than cast. Probably before they had their casting tooling made.
    #2
  3. igormortis

    igormortis Cafe Reise

    Joined:
    Dec 22, 2006
    Oddometer:
    1,478
    Location:
    London
    I was gonna mention it, but thought it was cheating 'cause I wasn't sure I could see them...
    #3
  4. igormortis

    igormortis Cafe Reise

    Joined:
    Dec 22, 2006
    Oddometer:
    1,478
    Location:
    London
    Hub looks quite complex, but looks like it would do away with some weight of the production disc carrier.
    #4
  5. Big Bamboo

    Big Bamboo Aircooled & Sunbaked

    Joined:
    Sep 29, 2010
    Oddometer:
    6,704
    Location:
    Big Island of Hawaii
    What years/models were they "wet"?
    #5
  6. igormortis

    igormortis Cafe Reise

    Joined:
    Dec 22, 2006
    Oddometer:
    1,478
    Location:
    London
    None - only seen on pre-production bikes. Presumably it was nixed for liability reasons - that rear boot just waiting to spew oil over the rear tyre.

    I am curious if anyone runs a wet paralever - I bet there's someone out there... Oil may not play nice with the shaft damper material though.
    #6
  7. Airhead Wrangler

    Airhead Wrangler Adios Mexico

    Joined:
    Mar 4, 2008
    Oddometer:
    6,759
    Location:
    Back in Seattle, FINALLY
    Prototypes only. Everything that got sold was dry. Look at the parts fiche. It still shows the fill plugs on the swingarm. 88 and 89 models have the raised flat on the swingarm where it was never drilled for the plugs. They eliminated it later, but you can still see where the tooling was modified to eliminate them on the later ones.
    #7
  8. Mark Manley

    Mark Manley Been here awhile

    Joined:
    Apr 3, 2010
    Oddometer:
    976
    Location:
    Back home in the UK
    I wish my GS was still that clean, it makes me want to get out there with the polish.
    #8
  9. Padmei

    Padmei enamoured

    Joined:
    Mar 12, 2008
    Oddometer:
    4,088
    Location:
    Nelson New Zealand
    makes me want to get out there & pour some mud over that bike:evil

    800ccs what were they thinking. Noone could rid a bike that powerful off road
    #9
  10. Box'a'bits

    Box'a'bits In need of repair

    Joined:
    Sep 26, 2008
    Oddometer:
    2,996
    Location:
    Wellington, New Zealand
    No cross over in the exhaust headers :wink: No return springs in the centrestand. :D
    #10
  11. Noswal

    Noswal Adventurer

    Joined:
    Jun 18, 2009
    Oddometer:
    92
    Those appear to be the rims that run tubeless tires- weren't they in production later (when the oilheads came out)?
    #11
  12. Beater

    Beater The Bavarian Butcher

    Joined:
    Sep 3, 2009
    Oddometer:
    3,699
    Location:
    Atlanta, GA, USA
    No, the GS's all had the spoked tubeless type rims. There are some tires that you have to run tubes though ... Heidenau K60 front comes to mind ..
    #12
  13. Stagehand

    Stagehand Imperfectionist

    Joined:
    Oct 6, 2004
    Oddometer:
    30,177
    Location:
    Shawangunks
    Is that a Basic?
    #13
  14. igormortis

    igormortis Cafe Reise

    Joined:
    Dec 22, 2006
    Oddometer:
    1,478
    Location:
    London
    Nope, a pre-production R80GS, by the looks of things. Close though.

    Do tell. I've run a front K60 tubeless.
    #14
  15. tofgasp

    tofgasp Adventurer

    Joined:
    Mar 5, 2008
    Oddometer:
    58
    It might not be a real BMW but a BMC:

    [​IMG][​IMG]
    #15
  16. Stagehand

    Stagehand Imperfectionist

    Joined:
    Oct 6, 2004
    Oddometer:
    30,177
    Location:
    Shawangunks
    holy wow- I have never even heard of such a thing
    #16
  17. Beater

    Beater The Bavarian Butcher

    Joined:
    Sep 3, 2009
    Oddometer:
    3,699
    Location:
    Atlanta, GA, USA
    Then you got lucky. I do not know the statistics, but I've heard of many people having a 'slow leak' from the K60 on the front stock GS rim. As a matter of fact, my seated well for the first ~4 weeks or so, then it was just a slow gradual leak. On a ride to work, I got about half way there and it was REALLY flat ... like ~5-10 pounds of pressure ... I stopped immediately to use a pump, but the tire's bead went. I tried several times to seat it, and then had a professional re-do it ... It would never reseat. I finally put a tube in it, and then I heard the stories about the K60 and GS rims.

    I really like the tire too. Good at most things, great milage. I'll probably buy them again if I can't get the Mitas E09.
    #17
  18. bmwblake

    bmwblake upside down parker

    Joined:
    Mar 3, 2004
    Oddometer:
    3,274
    Location:
    nashville, tn
    fwiw my 94 r100gs has the raised flat spots on the swingarm just like my 88 did.
    here's a pic of the 88 swingarm. you can see the raise flat spot well.

    [​IMG]


    #18
  19. Airhead Wrangler

    Airhead Wrangler Adios Mexico

    Joined:
    Mar 4, 2008
    Oddometer:
    6,759
    Location:
    Back in Seattle, FINALLY
    Weird. My '93 doesn't have them.
    #19
  20. Rob Farmer

    Rob Farmer Long timer

    Joined:
    Aug 27, 2002
    Oddometer:
    6,393
    Location:
    Loughborough, Leicestershire. England
    My 93 does. Looks like BMW were using up old stock.
    #20