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fuel pouring out my airfilter box

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  • fuel pouring out my airfilter box

    [FONT=times new roman][COLOR=orangered]
    I bought an 1100 that hasnt run for 10 years. After cleaning the carbs and re-installing them, the bike runs like a rocket, but fuel runs out the bottom of my airfilter box with the petcock in all but the off (pointing forward) position. What can cause this????Can someone out there help? Please?

  • #2
    hmm...probably you have a need/seat with something holding it open or your float(s) are not adjusted correctly.


    I hate carbs (and so did Dr Atkins).


    Dan
    Home of ENIAC

    Kinda like a MANIAC with 2 letters difference & a computer on board

    Comment


    • #3
      Drip...Drip..Drip...?

      Check out this thread

      "Gas in crankcase: what does it MEAN?"

      You can use the search feature to find.
      Prom does an Xcelenat job about this.

      Welcome to XS land

      mro
      btw
      leaky fuel short answer: petcocks not shutting off, float needle not seating, float stuck

      Comment


      • #4
        Re: Drip...Drip..Drip...?

        Add to that answer...if you have the press-in fuel valve (needles and seats) that were used on the later models, you may have leaks around the orings. Those orings are in a groove on the outside circumference of the fuel valve(s).

        Originally posted by mro

        btw
        leaky fuel short answer: petcocks not shutting off, float needle not seating, float stuck
        Skids (Sid Hansen)

        Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

        Comment


        • #5
          I hate carbs (and so did Dr Atkins).
          Five pounds last week, but then there was the pizza party on the weekend. Healthy breakfast this morn: diet soda and a nice hunk o' steak. 'nother week or two and it's back into my leather pants.( I might even wear them when I go riding, too!)
          Leaking carbs:
          hasnt run for 10 years
          tips of the float needles have grooves worn into them from sitting closed in their seats for ten years, grooves worn due to the minute grit particles in the fuel eroding the tapered tips, floats are bad(filled with fuel), or just improperly adjusted. (from sitting with fuel in the bowls over years, the continual stress on the floats can cause the little tang to bend, sending them out of adjustment)
          Pull the carbs and pull the needles. Polish the seat with chrome polish and Q tips. Replace the needles.(any bike shop will have them)bring the old ones to match them up.
          Or, like my neighbor's lawn mower last weekend, a piece of crap lodged between the needle and seat holding it open.
          Replace the fuel lines, as they deteriorate over time and small chunks can break off and flow to the carbs.
          "Damn it Jim, I'm a doctor, not a mechanic!' ('Bones' McCoy)

          Comment


          • #6
            Jim,
            is it leaking while the bike is running or off and at rest? if the latter, you might just need to get used to turning on/off the petcocks....
            81 Standard "Babe the Blue"
            sticky side down!

            Comment


            • #7
              Jim,
              We need to know the year and model of your XS. If it's an early standard or specail, the needls can be replaced. about 1980 and above, you should replace the needle/seat assembly, as they are a "press in" and have an "O" ring for a seal.If the O ring is bad, and it will be after sitting for 10 years, gas will flow past it into the float bowl.
              Bottom line:
              Read "Tech Tips" on carbs.
              Remove carbs, flip upside down and remove float bowls.
              REPLACE needle/seat assembly
              reset ALL floats to same setting.
              replace float bowls, and reinstall carbs.
              Use a "carb stick" or vacum gauges to sync. carbs.
              You will quit leaking gas, and be running well.
              Ray
              Ray Matteis
              KE6NHG
              XS1100 E '78 (winter project)
              XS1100 SF Bob Jones worked on it!

              Comment


              • #8
                pour guy

                and the journey begins...

                where will it take you?

                to distant places the xs was made for?
                "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

                Comment


                • #9
                  Re: pour guy

                  Mason, why is that honda parked in your past? It looks out of place in that sea of Yamahas.
                  Skids (Sid Hansen)

                  Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

                  Comment


                  • #10
                    Re: Re: pour guy

                    Originally posted by skids
                    Mason, why is that honda parked in your past? It looks out of place in that sea of Yamahas.
                    hey skids, everyone succumbs to indiscretion every now and again...
                    "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

                    Comment


                    • #11
                      Stop it! I'm on a 1200 calorie diet!

                      _must_resist_crispy_cremes_


                      :-)

                      Dan

                      Originally posted by prometheus578
                      Five pounds last week, but then there was the pizza party on the weekend. Healthy breakfast this morn: diet soda and a nice hunk o' steak. 'nother week or two and it's back into my leather pants.( I might even wear them when I go riding, too!)
                      Home of ENIAC

                      Kinda like a MANIAC with 2 letters difference & a computer on board

                      Comment


                      • #12
                        Float Pin Tool

                        Hey Jim,

                        Recommend you check with Ken Talbot for a float pin tool since you are going to be working on those carbs.
                        80 XS11 SG
                        79 XS750 SF
                        74 KZ400
                        78 KZ650
                        78 KZ750

                        Comment


                        • #13
                          What did you EXpect?

                          Hi Jim Harrell

                          Ask a simple question???
                          Well you could get a few more answers
                          TC and Ken, and others must be busy.

                          Fuel leak only if: 1) float pin not shutting off/o-ring leak
                          2) pet cock NOT shutting off

                          need to see why pet cock not shutting off fuel when engine not running. (vacuum actuated)

                          Float pin stuck open, needs to be replaced or debris/or worn seat keeping it open

                          mro

                          btw
                          Ken has a neat tool that can help remove the float pin. Problem with breaking off carp post that holds float pin by other methods resolved..

                          If you use the search feature, can find answers to most common problems w/XS bikes. Even what blade to shave with or what "dog" you might like to have.

                          Comment


                          • #14
                            Ugh.... still trying to shake the image of Pro in his leather pants...... keep having flashbacks of the guy in all black leather from the Village People...lol.

                            OK... everybody now....."It's fun to stay at the Y M C A !!"


                            Is Jim still here?? lol. I'm still waiting to hear if it happens while running, or stopped.. (Kind of sounds like he meant when running) and if he's tried anything yet... also... if he still has his octo??

                            Tod
                            Try your hardest to be the kind of person your dog thinks you are.

                            You can live to be 100, as long as you give up everything that would make you want to live to be 100!

                            Current bikes:
                            '06 Suzuki DR650
                            *'82 XJ1100 with the 1179 kit. "Mad Maxim"
                            '82 XJ1100 Completely stock fixer-upper
                            '82 XJ1100 Bagger fixer-upper
                            '82 XJ1100 Motor/frame and lots of boxes of parts
                            '82 XJ1100 Parts bike
                            '81 XS1100 Special
                            '81 YZ250
                            '80 XS850 Special
                            '80 XR100
                            *Crashed/Totalled, still own

                            Comment


                            • #15
                              Hey! I look good... damned good!
                              Leather pants, studded jacket, a pink feather boa that sways from side to side as I walk....
                              "Damn it Jim, I'm a doctor, not a mechanic!' ('Bones' McCoy)

                              Comment

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