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  • #16
    Check and make sure that the throttle arm isn't hitting the hose clamp things that hold the carbs to the boots on the engine side. If those are rotated so the screws are near that arm it will hang and hold your idle up....
    1979 xs1100 Special -
    Stock air box/K&N Filter, MAC 4-2 exhaust, Bad-Boy Air horn, TC fuse box, Windshield, Soft bags, Vetter Fairing, Blinkers->Run/Turn/Brake Lights, Headlight Modulator, hard wire GPS power

    Short Stack - 1981 xs1100 Standard - lowered for SWMBO.

    Originally posted by fredintoon
    Goes like a train, corners like a cow, shifts like a Russian tractor, drinks like a fish, you are gonna love it.
    My Bike:
    [link is broken]

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    • #17
      I did but i will double check.
      1979 XS1100 SF
      1981 KZ440 bobber

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      • #18
        Just guessing here, is the choke out? Are the choke valves attached tight to the lever arm?
        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

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        • #19
          You might pull the airbox and try to see if the slides are all working the same and peer through the carbs with a flashlight and mirror while it is running, just to possibly see if something looks amiss. I am quite stumped right now. The only thing I can think of is hanging slides letting too much fuel-air mix in...
          Ich habe dich nicht gefragt.

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          • #20
            no choke. it fired right up with out the choke. just very odd that once it idled for a min the rpm's would spike. oh well.
            1979 XS1100 SF
            1981 KZ440 bobber

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            • #21
              Do you still have the stock airbox? I had a similar problem with Betsy - wouldn't start with the choke, but fired up without it. It wound up being a constriction in the vent lines. I have pods and I had little filters attached to the ends of the vent lines. The filters were the type with a paper element inside, and evidently they were beginning to get saturated with moisture reducing the flow. I took the filters off and it worked fine. JAT
              I think I have a loose screw behind the handlebars.

              '79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake lines

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              • #22
                I got rid of the air box a while ago and use pods with the stack mod. I do have clubmans on the bike now and the throttle cable is about a foot too long. It feels like everything is fine with the tension but maybe i just need to replace it with a shorter one. What would be a shorter throttle cable that i can use?
                1979 XS1100 SF
                1981 KZ440 bobber

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                • #23
                  Do you have anything on the end of the vent lines?
                  I think I have a loose screw behind the handlebars.

                  '79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake lines

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                  • #24
                    Nope. i have seen people on here say that nothing is needed on the end of the lines. Could this cause the RPM's to climb?
                    1979 XS1100 SF
                    1981 KZ440 bobber

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                    • #25
                      I doubt it would cause the rpms to climb, but it can cause problems with the choke. You might want to make sure nothing has climbed up inside those lines and made a home. After re-reading the thread, I'd start with a colortune and a proper sync in regard to the idle issue. I think the sych is the most likely cause.
                      I think I have a loose screw behind the handlebars.

                      '79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake lines

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                      • #26
                        I may have missed something in this post.I read through the whole thread and only find a bread tie sync.
                        If that is the case.
                        SYNCRONISE THE CARBURETORS!IF YOU HAVENT ,THAT WILL CAUSE YOUR PROBLEM.
                        80 SG XS1100
                        14 Victory Cross Country

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                        • #27
                          I will sync but idling just fine to the rpms just start climbing after a couple of min, I doubt it from not being 100% sync. Then again i dont really know what im doing
                          1979 XS1100 SF
                          1981 KZ440 bobber

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                          • #28
                            It is possible it is the synch but make sure you have sufficient fuel to you carbs when you lean out (fuel level drops) your RPM's will rise. Then synch your carbs!

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                            • #29
                              Doubt all you want.You are the one chasing your tail.
                              80 SG XS1100
                              14 Victory Cross Country

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                              • #30
                                Wow thanks tarzan...Oh and how do you sync carbs when you cannot keep the bike from reving out of control? I can back the idle adjust screw out and it wont change a thing. There seems to be enough fuel going by looking at the lines.
                                Last edited by joebus; 08-31-2009, 06:26 AM.
                                1979 XS1100 SF
                                1981 KZ440 bobber

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