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Thread: Help on part number location for 1978 R100 OEM Mufflers

  1. #1

    Help on part number location for 1978 R100 OEM Mufflers

    I have a like new 78 R100S. The only thing not original are the mufflers. They have nice Keihan ss aftermarket mufflers. I just bought a very nice set of used OEM mufflers to put on and am wanting some help from someone with a 78 model r100 bike with original mufflers. Did they start putting the part numbers on the end of the mufflers by 78? I know the 80's bikes had them on the end.
    The ones I have have the part numbers by the mounting brackets and not on the end. The part numbers are 18121233031 and 032. Zeuna, a BMW logo and ZS 120 and 121. Of course, if you go to a BMW parts site such as Max's, you get the new numbers which do not help me. Those numbers are now given for all 74-84 models.
    I want the ones on my bike to be like they came originally.
    Help if you can.

  2. #2
    Registered User
    Join Date
    Sep 2003
    Virginia Beach
    I have a R60/6 ('75), and, yes, Zeuna with part numbers stamped into the end of the mufflers.
    Virginia Beach
    current:16 R1200R 75 R60/6
    past: 14 R1200RT 11 R1200RT 10 R1200RT 03 R1200CLC

  3. #3
    Registered User lkchris's Avatar
    Join Date
    Mar 2003
    Albuquerque, NM
    The mufflers you can buy new from a dealer with have a PARAGRAPH of emissions information stamped onto them.
    Kent Christensen
    '12 R1200RT, '02 R1100S

  4. #4
    Registered User toooldtocare's Avatar
    Join Date
    Mar 2008
    DeLand Florida
    The mufflers on my recently sold 78 Motorsport.
    Attached Images Attached Images

  5. #5


    Thanks for all your help. I think I have it figured out.

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