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  • Need some suggestions

    Just sync'd the carbies this morning, and went to show the wife that I brought "Black Mamba" back to life and it was popping during idle. My idle mixture screws are set at 1 1/4 turns out right now, and I know I have to tune them appropriately. Will out of tune carbs cause this popping. I also am going to adjust the CCT tonight as well. While I am in there I will check the wires and give them the 'ol tug everyone talks about. We will see what happens after that. Any suggestions are appreciated.
    Thanks

    At work, so nothing better to do than to learn about bikes
    1980 XS1100SG "Black Mamba" 28K
    1979 XS1100F 33k (Current Project)
    1981 XS1100H "Blue Balls" (Crashed and under repair )

    1978 XS1100E "Partsy"

    Work Hard, Play Harder!

  • #2
    GIT-ER-DONE and let us know what's up.
    Greg

    Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

    ― Albert Einstein

    80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

    The list changes.

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    • #3
      Yes, and 1 1/4 turns is very likely not far enough out. Either adjust for highest RPM or use a colortune, there is a tech tip on tuning the idle mixture by ear that explains how to do it by ear.
      Cy

      1980 XS1100G (Brutus) w/81H Engine
      Duplicolor Mirage Paint Job (Purple/Green)
      Vetter Windjammer IV
      Vetter hard bags & Trunk
      OEM Luggage Rack
      Jardine Spaghetti 4-2 exhaust system
      Spade Fuse Box
      Turn Signal Auto Cancel Mod
      750 FD Mod
      TC Spin on Oil Filter Adapter (temp removed)
      XJ1100 Front Footpegs
      XJ1100 Shocks

      I was always taught to respect my elders, but it keeps getting harder to find one.

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      • #4
        I did my CCT adjustment and it seems to be working fine. I need to do some sort of fix on the plug as it is leaking oil, not sure which one I will use. I'm sure I will get the notorious auto CCT mod suggestions, but I do like the upgrade I've seen of the original CCT. That way I get to keep it

        Found out tuning by ear is a bit more challenging than I thought it would be, although it is running a lot better now. I will check the plugs when it cools down and see what they look like. What color am I looking for?

        Also, on another note. I checked them before I final tuned and No. 2 plug was wet, with what smelled like oil. Did the 'ol spit test and 1,3, and 4 headers all burnt it off instantly. Spit stuck to no.2 header. So I am guessing that No.2 cylinder isn't firing due to the wet plug. Any ideas on what my issue is? Rings? Did look like a milky white substance in my oil(gas?). Could it be my float in the no.2 carb and I'm just not smelling it right?

        I did take it for a ride and it was excellent getting back on her again. Ran pretty well, a few backfires on decel at high RPM's. Will resync tomorrow and see what that does.

        Might have an octy issue, as it seems it runs better on prime.

        On a side note, brakes work great but it will take some getting used to after the smaller bore MC. Takes more of a squeeze than before And they don't lie about breaking in new tires. They sure seem goofy.

        Lastly, what size is the air pressure nozzle on the forks? Doesn't seem like a standard pressure gauge works to check it. I will be rebuilding them eventually but I wanna at least keep them up to par till I get that far. A few things need to take place before that.
        1980 XS1100SG "Black Mamba" 28K
        1979 XS1100F 33k (Current Project)
        1981 XS1100H "Blue Balls" (Crashed and under repair )

        1978 XS1100E "Partsy"

        Work Hard, Play Harder!

        Comment


        • #5
          Originally posted by Lbrown311 View Post
          ... I will check the plugs when it cools down and see what they look like. What color am I looking for?
          http://www.xs11.com/forum/showthread...hlight=reading


          Originally posted by Lbrown311 View Post
          …Did look like a milky white substance in my oil(gas?). Could it be my float in the no.2 carb and I'm just not smelling it right?
          Milky stuff in the oil is due to water/moisture in the oil. Happens to the guys that don't get the engine oil hot enough for it to come out of solution.

          Originally posted by Lbrown311 View Post
          …Lastly, what size is the air pressure nozzle on the forks? Doesn't seem like a standard pressure gauge works to check it. I will be rebuilding them eventually but I wanna at least keep them up to par till I get that far. A few things need to take place before that.
          They only take a few psi so either your gage isn't reading what's in them or they have none in them? Might want to get a 0-10 psi gage at the auto store to be able to measure to the nearest psi... As far as I know they are regular valve stems... maybe someone will prove me wrong...
          '79 XS11 F
          Stock except K&N

          '79 XS11 SF
          Stock, no title.

          '84 Chevy K-10 "Big Blue"
          GM 350, Muncie SM465, NP208, GM 10 Bolt with 3.42gears turnin 31x10.5 Baja Claws

          "What they do have is an implacable, unrelenting presence and movement that bespeaks massive power lurking behind paint and chrome. They don't wail like a screeching ninja, the don't rumble like a harley. They just growl like a spactic, stressed out badger waiting to rip your face off and eat your soul." Trainzz~RIP~

          Comment


          • #6
            Air pressure in the forks is only about 15 PSI, it is a standard air valve just like on your bicycle or car tires. You can use a bicycle air pump to presurize them, but it is not easy to find a gage that will read 15 PSI accurately.
            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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