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do i need new diaphrams??

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  • do i need new diaphrams??

    wat up guys i need some help. i got a 1980 xs1100 bobber and i think my carbs might be screwed up. it will idle fine but when i take off to go it seems to sputter out and i have to pretty much keep it full throttle to get anywhere and it sounds like it misses bad when i get on it like that. i have heard i need new diaphrams which might make since seeing how there is silicone on them apparently. ive also heard that one of my needles might had been clogged up which would also make since seeing how it ran ****ty for like a month then all of the sudden it ran right on for like two days but then started missing again. im totally confused somebody help me out so i can ride again before the end of time!
    SeX DrUgS AnD RoCk AnD RoLL!!!

  • #2
    You need a thread of hope!!!

    Namely the thread on Carb Cleaning 101!!! Do a search on "carb Cleaning 101" and you will find complete details on how to disassemble, inspect, clean , clean some more, and then clean some more, and THEN reassemble the carbs.

    If they were that dirty in there, then there is no substitute for tearing them down and cleaning them up. Anything less and your just chasing deamons.

    If indeed you do need new diaphrams, they can be purchased. Parts N More has the ones for the 80-81 model carbs for $64 each.
    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
      Yep. Clean the carbs. Don't focus on the diaphragms until you get in there and look at them though. Spend a good 2 hours, 2 cans of carb cleaner spray and a bit of compressed air, and you'll be glad you did.
      1980 XS850SG - Sold
      1981 XS1100LH Midnight Special (Sold) - purchased 9/29/08
      Fully Vetterized and Dynojet Kit added, Heated Grips, Truck-Lite LED headlight, Accel Coils, Irridium plugs, TKAT Fork Brace, XS850LH Final Drive & Black SS Brake lines from Chacal.
      Here's my web page devoted to my bike! XS/XJ User's Manuals there, and the XJ1100 Service Manual and both XS1100 Service manuals (free download!).

      Whether you think you can, or you think you cannot - You're right.
      -H. Ford

      Comment


      • #4
        For sure you need to clean them out first. after that then you can see better what might be going on.
        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

        Comment


        • #5
          mine did that too.....then I had my carbs ultrasonic cleaned and installed the stage 3 dynojet kit and all is right with the world. I was blown away when I pulled my needles out and 2 of the 4 had severly bent tips?!?!?!? How do you bend needle tips?
          1980 XS1100G
          Tulsa, OK

          Comment


          • #6
            Originally posted by MeatTooth View Post
            How do you bend needle tips?
            My dad always said I could F-up an iron ball!!!!
            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


            • #7
              Don't forget to check the pick up coil wires. They can lead to a myriad of symptoms one of which you are describing.
              2-79 XS1100 SF
              2-78 XS1100 E Best bike Ever
              80 XS 1100 SG Big bore kit but not fully running yet.
              Couple of more parts bikes of which 2 more will live!

              Comment


              • #8
                Originally posted by Rasputin View Post
                Don't forget to check the pick up coil wires. They can lead to a myriad of symptoms one of which you are describing.
                Those freakin pickup coil wires cause every freakin symptom imaginable.
                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

                Comment


                • #9
                  Thus the word Myriad!
                  2-79 XS1100 SF
                  2-78 XS1100 E Best bike Ever
                  80 XS 1100 SG Big bore kit but not fully running yet.
                  Couple of more parts bikes of which 2 more will live!

                  Comment

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