79 XS1100s engine VS. Modern engines?

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  • Alfresco
    New
    • Jul 2025
    • 1

    #1

    79 XS1100s engine VS. Modern engines?

    Hi. What is my 1979 yamaha xs1100s most comparable to in todays engine?
  • DiverRay
    Moderator
    • Nov 2004
    • 7654
    • Star, IDAHO

    #2
    Not much, as most modern bikes are liquid cooled, and the XS is air cooled. With no pumps or radiator to worry about, an air cooled engine is usually easier to work on.
    The Royal Enfield may be the only bike close to the XS, though they are smaller.
    The "new" bikes all have fuel injection, and that IS something good. They also will rev higher, have many more parts to adjust, and can be a real drag to do basic maintenance on. I sold my Kawasaki 1400 Connie because of the eight hour valve adjustment!
    One thing about the XS, you can put it in high gear at 40mph and just cruise. When you want to go faster, just twist the throttle and hold on. They are like a train, the faster it's going, the faster it accelerates.
    Ray Matteis
    KE6NHG
    XS1100 E '78 (winter project)
    XS1100 SF Bob Jones worked on it!

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    • gtem
      XStremely XSive
      • May 2023
      • 212
      • Indianapolis

      #3
      Air cooled 4cyl? I suppose something like a Honda CB1100, though they have a 16 valve head and fuel injection. I consider my Bandit 1200 to be about as close to a "UJM" type bike in the semi-modern era: a simple rugged carb'd air (and oil) cooled 4cyl.
      '79 XS1100F
      others: '98 GSF1200S
      Past Yamahas: '78 XS1100E, '76 XS500C

      Comment

      • Ccitis
        Truly XSive
        • Jun 2023
        • 154

        #4
        Originally posted by gtem
        Air cooled 4cyl? I suppose something like a Honda CB1100, though they have a 16 valve head and fuel injection. I consider my Bandit 1200 to be about as close to a "UJM" type bike in the semi-modern era: a simple rugged carb'd air (and oil) cooled 4cyl.
        Funny, I am looking for a Bandit 1250.... water cooled yes, but simple still. ABS and fuel injection being the only real electronics to speak of.

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        • LAB3
          XSive Maximus
          • May 2022
          • 707
          • Traveling the U.S. with no permanent address

          #5
          Originally posted by Alfresco
          Hi. What is my 1979 yamaha xs1100s most comparable to in todays engine?
          Working for Google are you? Yeah, coming up with short and sweet answers to basic questions is kinda fun actually.
          1980 XS1100G

          Intelligent people discuss ideas, average people discuss events, petty people discuss other people.

          Comment

          • gtem
            XStremely XSive
            • May 2023
            • 212
            • Indianapolis

            #6
            Originally posted by Ccitis

            Funny, I am looking for a Bandit 1250.... water cooled yes, but simple still. ABS and fuel injection being the only real electronics to speak of.
            I've come close on several occasions to buying a 1250. I probably will at some point. But for now, the looks/feel of the gen 1 1200S are my jam. One of these days I'll finally try out fuel injection!
            '79 XS1100F
            others: '98 GSF1200S
            Past Yamahas: '78 XS1100E, '76 XS500C

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