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Cone Filters/pilot jets removal !!

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  • Cone Filters/pilot jets removal !!

    Hi people,
    I am having a bit of trouble with the starting and running of my xs1100 1979. i have been told that my 4 cone filters may be adding to the trouble and that they need to be restricted by using a plate or tape accross the bell of the carbs, any thoughts ??


    Many thanks

    Gary

    UK

  • #2
    if they are a new addition, it may be the culprit and usually at 6k rpm and beyond, as some of the cheaper models out there restrict the air pilot jet, if it starting and running t may be something else, try pulling them off and starting it...
    some guru with more experience may takea stab at this when they show up.

    type in pod filters and some informative threads will pullup, good luck with it.
    "a good man knows his limitations" dirty harry
    History
    85 Yamaha FJ 1100
    79 yamaha xs1100f
    03 honda cbr 600 f4
    91 yamaha fzr 600
    84 yamaha fj 1100
    82 yamaha seca 750
    87 yamaha fazer
    86 yamaha maxim x
    82 yamaha vision
    78 yamaha rd 400

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    • #3
      Many thanks Mason,

      will have a look around. I think there is not enough restriction to let the floats pull up as i rev, when the engine is reving high, she seams ok !!

      Gary

      Comment


      • #4
        pilot jets removel !!

        Hello again,

        i tried to remove my pilot jets from the carbs on my 79 XS1100 but could not move them, i read somewhere that it is very easy to damage the slot in the top, they have sat untouched ans un started for ten years.

        any ideas on the safe removel

        Cheers

        gary

        UK

        Comment


        • #5
          Give a small shot of penetrating oil to hopefully work down into a few threads.
          Use a proper fitting screwdriver head. I don't know it you have Sears "Craftsman" tools over there, but one of their screwdrivers in the "Precision screwdriver" set is a perfect fit. These are just cheap brass jets, and the slot can be easily ruined by an ill-fitting screwstick.
          Place the screwdriver down in the slot. Give a decent amount of downward pressure. Grasp the handle firmly, twist your wrist(taking out all the slack due to the fleshy part of your hand)and then give a real firm QUICK twist.
          After being stuck there for too many years, a quick twist will "shock" the jet loose, while a slow steady turn will deform and strip the brass slot.
          "Damn it Jim, I'm a doctor, not a mechanic!' ('Bones' McCoy)

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          • #6
            will give that ago tonight, if the worst happends, how do you remove a damaged one

            Gary

            UK

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            • #7
              "Quit drillin' me fer answers."

              Cautiously, with a reverse cutting drill bit. (which usually, after a little while, will shock the jet into spinning out on it's own)
              "Damn it Jim, I'm a doctor, not a mechanic!' ('Bones' McCoy)

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              • #8
                use a #1 left twist easyout, maybe a little heat from a torch, very little, just to warm it up so you can stilll touch it with hand.
                79 F full cruiser, stainless brake lines, spade fuses, Accel coils, modded air box w/larger velocity stacks, 750 FD.
                79 SF parts bike.

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                • #9
                  use a #1 left twist easyout ???

                  is this the same as a extraction tool?

                  gary

                  UK

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                  • #10
                    Originally posted by gman
                    use a #1 left twist easyout ???

                    is this the same as a extraction tool?

                    gary

                    UK
                    Yes , same thing...

                    I dont worry too much about these jets , they are easy to get and not expensive ...but if you can save them is all the better ...

                    Bob
                    1979 XS1100 SPECIAL (under 18,000 miles Sold 5/12/2016
                    1982 XJ1100 MAXIM(PARTS BIKE??)shows 14,000 miles ??? Up for sale whole or parts

                    Comment


                    • #11
                      Hey there Gman,

                      Looking at the time stamps on your messages, I see this thead was BEFORE you decided to take the carbs off and clean them, and then developed a problem getting the pilot jets out!

                      If they are stuck in there, then they are probably also very gummed up, and that is probably the MAIN problem with your starting and low rpm performance, since you said it ran okay at the higher rpms, which is getting into the main jets by then!!

                      The pilot circuit and starter circuit is very suceptible to varnish and clogging. There is a jet in the bottom of the float bowl where the starter fuel line tube from the carb body fits into , and draws fuel thru, but if that bowl jet is clogged, no petrol, no start!!

                      Use a fine brass or copper wire to probe inside that bowl jet, along with spray carb cleaner to ensure that it's open!!

                      Also, don't turn the throttle when trying to start the bike, that only opens the butterflies, and drops the vacuum so that the enrichener can't pull the fuel from the bowls as effectively, less petrol, no start!!

                      I also merged this thread with your other one, since they are kinda related. It's best to keep the same problem, posts, replies, info on what you've tried, etc., in the same thread so WE don't repeat ourselves in suggesting things to try, etc.!!
                      T.C.
                      T. C. Gresham
                      81SH "Godzilla" . . .1179cc super-rat.
                      79SF "The Teacher" . . .basket case!
                      History shows again and again,
                      How nature points out the folly of men!

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                      • #12
                        I took a bad phillips head screw driver to the bench grinder. I converted it to a "thick" flat head screw driver that fits directly into the slots in the jets with no slop. Pulls them out every time.
                        United States Merchant Marine Academy, Kings Point, NY
                        If I can do it at 18 yrs old, anyone can
                        "You know something, You can't polish a turd"
                        "What are you rebelling against", "Well, what do you got?"
                        Acta Non Verba

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                        • #13
                          Hi TC,
                          thanks for the merge !!
                          as you described, the interior of the carb bowls and all other parts was covered in a varnish type substance ?? i managed to clean most of it from the floats, bowl and main jets but cannot yet get to the other bits, will get some carb cleaner tonight and give it a spray. I was amased how much the main jets were blocked, totally cvovered in the varnish !!

                          so near but so far

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                          • #14
                            hobbyman,

                            that sound a cool idea, will try that as i have loads of bad drivers !!

                            many thanks

                            Gary

                            UK

                            Comment


                            • #15
                              jet removal,

                              Hi Gman,
                              if anything will pull a jet, this will. Grind an exact-fit edge on an old screwdriver, cut the handle off and mount the stem in a drillpress. Tear the carb down to the bare casting (you're gonna clean it anyway, right?) and hold it on the drillpress bed with the diaphragm flange downward so the jet looks up. Hold the screwdriver blade down on the jet with the drillpress feed handle and back the drill chuck around by hand to unscrew the jet.
                              Fred Hill, S'toon.
                              Fred Hill, S'toon
                              XS11SG with Spirit of America sidecar
                              "The Flying Pumpkin"

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