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Exhaust pipes 3&4 are not heating up?

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  • Exhaust pipes 3&4 are not heating up?

    78xs cyliders 3&4 are not fireing???
    79xs11 g
    k&n oval pods
    4-2 jardine spagetti headpipes w reverse short cone

  • #2
    Most likely cause is fuel. 3&4 get fed from your right petcock (typically). On the 78 model you have vacuum operated petcocks, so if the vacuum diaphram is messed up it might not feed fuel. Try turning that patcock to prime and see if it clears up.

    Also look for kinks in the fuel line. Otherwise, you could have a clogged petcock or something liek that, but it is alot less likely.
    Life is what happens while your planning everything else!

    When your work speaks for itself, don't interrupt.

    81 XS1100 Special - Humpty Dumpty
    80 XS1100 Special - Project Resurrection


    Previously owned
    93 GSX600F
    80 XS1100 Special - Ruby
    81 XS1100 Special
    81 CB750 C
    80 CB750 C
    78 XS750

    Comment


    • #3
      ok.now its only #4....
      79xs11 g
      k&n oval pods
      4-2 jardine spagetti headpipes w reverse short cone

      Comment


      • #4
        you might also want to check that
        the mixture screw isnt broken on the number 4 carb.
        pete


        new owner of
        08 gen2 hayabusa


        former owner
        1981 xs1100 RH (aus) (5N5)
        zrx carbs
        18mm float height
        145 main jets
        38 pilots
        slide needle shimmed .5mm washer
        fitted with v/stax and uni pod filters

        [url]http://www.youtube.com/watch?v=3pA8dwxmAVA&feature=mfu_in_order&list=UL[/url]

        Comment


        • #5
          Or at least try adjusting the mix screw to no 4. Or replace/clean the plug in no 4.

          Might also look into cleaning the carbs up then. Once it is down to one cylinder, it is usually a carb issue.
          Life is what happens while your planning everything else!

          When your work speaks for itself, don't interrupt.

          81 XS1100 Special - Humpty Dumpty
          80 XS1100 Special - Project Resurrection


          Previously owned
          93 GSX600F
          80 XS1100 Special - Ruby
          81 XS1100 Special
          81 CB750 C
          80 CB750 C
          78 XS750

          Comment

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