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Thread: US spec vs Euro Spec bikes

  1. #1
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    US spec vs Euro Spec bikes

    What are the main differences in early 1980's R100's that were built for Europe
    vs the US.

  2. #2
    Cannonball Rider #52 darrylri's Avatar
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    So far as I can remember:

    On the US side, the fresh air injection system that put filtered air into the exhaust ports, to facilitate complete burning of the exhaust gases.

    On the European side (rest of the world, actually), the ability to switch off the headlight.
    --Darryl Richman, forum liaison
    http://darryl.crafty-fox.com

  3. #3
    Registered User PAS's Avatar
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    I think the cam sprocket was slotted differently to change timing. Best to do some research on this.

  4. #4
    Registered User lkchris's Avatar
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    R100
    USA 8.2 compression
    ROW 9.5 compression
    Kent Christensen
    21482
    '12 R1200RT, '02 R1100S, '84 R80G/S

  5. #5
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    Not sure about post 80 but pre-80 US bikes typically had higher wider handlebars, and thus different mirror stalks. This is why the bars used with an S fairing are called Euro handle bars, because the were standard on unfaired bikes in Europe. Plus of course emissions and no headlight off switch.

  6. #6
    rsbeemer 22600's Avatar
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    1980 Euro mdL

    I bought a 1980 r100rs with Euro. Specs. in 1980 and owned it for around 30 years. Main difference visually was the Euro. had the old type air cleaner housing made out of metal whereas the 1980 USA version was made out of plastic. Of course the old type air cleaner was round and the new type square. The exhaust on the Euro. was 40mm as I recall and the engine had higher compression. The gentleman I bought it from also told me the rear differential was geared lower than the USA version. Of course the speedometer was in Kilometers. There could have been more visual and internal differences but I'm not sure. Some BMW no-it-all's will have the answers.

    DW
    1978 R100rs MOA#22600 125cc Kymco
    The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.

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