Shift linkage boss?

Discussion in 'Airheads' started by DiabloADV, Jan 5, 2013.

  1. DiabloADV

    DiabloADV Semi-Occasional

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    When did the airhead frames first get the boss to which the shifter linkage attaches? As opposed to the shifter that attaches directly to the shifter shaft on the gearbox...

    I find pics of /5 and /6 bikes without it, and later bikes with it. But when did it first appear?
    #1
  2. Rob Farmer

    Rob Farmer Long timer

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    I'm not too sure but I thought it was 77/78 but a lot of bikes had it retrofitted because it improves the gear change so much.
    #2
  3. carpetburn

    carpetburn Been here awhile

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    correct- i fitted one to my/6
    #3
  4. boxerboy81

    boxerboy81 Stay Horizontal

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    It's easy enough to find pix of 1978 models with the direct gear lever, and even some 1979 ones. I'm guessing it's during the 1979 model run starting with the straight rod with the rubber bellows cover.

    edit: Have a look at this 1978 brochure...

    [​IMG]
    #4
  5. rambozo

    rambozo Been here awhile

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    Both my 78 and 79 have the rubber bellow shifter as per that photo

    Robs probably right with 77/78 year
    #5
  6. outfit

    outfit Been here awhile

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    I've retrofitted both my Mono and /7 to direct year's ago:thumb The gear linkage may well have been okay when new, but the sloppiness soon set's in. Anyway's I think it was just a publicity stunt by BMW in answer to press complaint's.:wink:
    #6
  7. DiabloADV

    DiabloADV Semi-Occasional

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    My bike is a 74 90/6, and has the shifter boss. So I guess it was retro-fitted. How would somebody tell a /7 frame from a /6 frame?
    #7
  8. supershaft

    supershaft because I can

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    It had to of been late '78? I remember lots of our customers making the retro-switch. Lots of people said that it improved shifting quite a bit. I do too. Sloppy? The have replaceable bushings, bearings, and bolts. I have repaired quite a few of them and then they are like new again.
    #8
  9. chollo9

    chollo9 Screwed the Pooch

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    Serial number?


    :hide
    #9