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    HI ALL. THIS IS MY PROBLEM. MY 79 S SOMETIMES WILL STATE FINE. AFTER RIDING IT STARTS MISSING AND THEN CUTS OFF. AT TIMES IT WILL RESTART RIGHT AWAY BUT BE MISSING. THE PICK UPS LOOK OK I DO HAVE A 80 S FOR PARTS I AM GOING TO PUT THE PICK UPS FROM IT TO SEE IF IT MAKES IT BETTER. IS THERE ANY ONE PLACE I SHOULD LOOK TO FIX THIS THANKS ALL
    Joe Bjordahl
    “speed don't kill it’s the sudden stops”
    Yamaha xs1100 are addictive
    1979 XS1100S
    1981 XS1100 MIDNIGHT
    1982 XS1100S DONER BIKE

  • #2
    Other things to check.

    Running too rich and fuel fouling?
    Gas cap breather plugged? Try opening the cap while running.
    Inline filter plugged of maybe gunk collected on the petcock's filter tower?
    Vacuum hose to the octopus is either not connected or has a bad leak.
    Sticking float valve?
    Skids (Sid Hansen)

    Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

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    • #3
      it does run rich need new boots. went it cuts off there is no spark . i put a new plug in wire no spark.
      Joe Bjordahl
      “speed don't kill it’s the sudden stops”
      Yamaha xs1100 are addictive
      1979 XS1100S
      1981 XS1100 MIDNIGHT
      1982 XS1100S DONER BIKE

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      • #4
        Have you checked the kill switch circuitry?

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        • #5
          thanks for the help once again . changed pick ups new plugs little carb adjust running great thank you again
          Joe Bjordahl
          “speed don't kill it’s the sudden stops”
          Yamaha xs1100 are addictive
          1979 XS1100S
          1981 XS1100 MIDNIGHT
          1982 XS1100S DONER BIKE

          Comment

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