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need help on my recently purchased 1979 xs1100

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  • #1

    need help on my recently purchased 1979 xs1100

    hello, im new to this forum. i just bought a 1979 xs1100 special off craigslist for $550. i need help diagnosing some problems. the far left side carb backfires, the bike smokes once warmed up, once the bike is fully warmed up it runs fine...any help would be greatly appereciated....
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  • #2
    Hi and welcome. I suggest you take the carbs off and thoroughly clean them and see what jets you have in there, if any are plugged and what your float heights are. After that, synchronize them. I have a '79 as well and it wasn't running well after sitting for almost a year. The guys here convinced me to do what I just suggested that you do and the results couldn't be better. Don't be afraid to do it, you'll get lots of help here. BTW, at least synchronize the carbs. If the one is out of synch with the others you can get all kinds of weird symptoms including the backfiring.
    '79 XS11 Special, fork gaiters, Uni pods, 45 pilots, 140 mains, ditched the octy, solo seat, T kat fork brace

    Purrs like a kitten, runs like a scalded cat

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    • #3
      this is my first inline 4 bike and i love it so far. i have cleaned the carbs and jets i just dont know how to sync them..

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      • #4
        does anyone know where the mixture screws are

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        • #5
          manual

          heres a link to download the full manual from Catatonic Bug's page:

          http://www.ringler.us/family/mybike.html

          John
          John is in an anonymous city with an Alamo (N29.519227,W-98.678980)

          Go ahead, click on the bikes - you know you want to...the electrons are ready.
          '81 XS1100H - "Enterprise"
          Bob Jones Custom Navy bike: Tkat brace, EBC floating rotors & SS lines, ROX pivot risers, Geezer rectifier, new 3H3 engine

          "Not all treasure is silver and gold"

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          • #6
            No offence ment, but if you dont know where the mixing screws are you probably didnt get the carbs clean. Follow this link here and do through the carbs again. It usually takes new people a few tried before they finally get them clean, I think I was at #4 before I finally cleaned EVERYTHING in the carbs so don't feel bad. Also when you are in there look at the jets and see what size they all are and also measure the float height when you are in there.

            http://www.xs11.com/forum/showthread...b+cleaning+101
            Nathan
            KD9ARL

            μολὼν λαβέ

            1978 XS1100E
            K&N Filter
            #45 pilot Jet, #137.5 Main Jet
            OEM Exhaust
            ATK Fork Brace
            LED Dash lights
            Ammeter, Oil Pressure, Oil Temp, and Volt Meters
            Green Monster Coils
            SS Brake Lines
            Vision 550 Auto Tensioner

            In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

            Theodore Roosevelt

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            • #7
              Synchronizing the carbs is a snap. Basically all you do is attach four hoses to the nipples on the inlet boots and turn three screws until they all read the same on the synch tool. This is an oversimplification, but if you read the info on this site you will do it very easily. I got a nice synch tool off ebay for 78 bucks.
              '79 XS11 Special, fork gaiters, Uni pods, 45 pilots, 140 mains, ditched the octy, solo seat, T kat fork brace

              Purrs like a kitten, runs like a scalded cat

              Comment

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