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Brake Reservoir O-ring 18 X 21
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    • Part # 3431475
      Brake Reservoir O-ring 18 X 21

    • $3.95

    • In Stock
      Caution! Our Brake Reservoir O-ring 18 X 21 does not fit all bike models. Please select your bike if you are not sure.

       

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    Description


    Brake Reservoir O-ring 18 X 21

    Hard to find O-ring (it is not available from BMW) between the brake fluid reservoir and the brake master cylinder under the tank of BMW Airheads after to 09/75. The o-ring is specifically designed to be brake fluid resistant to provide the user a long and durable life-time.

    O-ring for between brake fluid reservoir and master cylinder, R75/6 - R100RT. This fits the one-hole reservoir 1976-1980 (and possibly 1975 ). Measures 18mm ID x 1.5mm thick ( 21mm OD).

    Equivalent to BMW part # 34 31 1 234 707 ( 34311234707 )

    NOTES:
    • This is is the for the later-version of the master cylinder (one whole reservoir), measure to make sure your master cylinder if uncertain
    • Prior to 09/75 the o-rings needed for the reservoir to be properly sealed =12x16 and 6x10 (see Related Products)


      34 31 1 234 707
      34311234707

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    Bike Fitment


    R60-6

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    R75-6

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    R90-6

    1976

    R90 S

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    R60-7

    1976 · 1977

    R75-7

    1976 · 1977

    R100-7

    1976 · 1977 · 1978

    R100 RS

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    R100 S

    1976 · 1977 · 1978 · 1979 · 1980

    R80

    1977 · 1978 · 1979 · 1980

    R100-T

    1978 · 1979 · 1980

    R100 RT

    1978 · 1979 · 1980

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