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  • #1

    Carb Rebuild Gas pouring out

    Hello gentlemen, before I gather up every part and piece of my two xs11's put them in a pile and set them on fire I would like to know if there is a way to stop the gas from pouring out of all four of my carb bodies.

    79 xs11sf carbs
    I just finished putting the carbs back together after dipping and cleaning. All floats and pins and needles all move freely and smoothly. every part of the carb is clean.

    when i pour gas into the carb to test for leaks off the bike, i hear the sound of the gas traveling through the airways until it pours out of the 4 little hole on the airbox side of the carbs.

    did i put the floats in upside down or what?
    Tags: None
  • #2
    You say you dipped them?? Did you replace the butterfly shaft seals? Dipping will destroy those.

    As for the leaking, try tapping the bottoms of the float bowls with a screwdriver handle and see if the floats are just stuck. If that doesn't work, verify that the bowl gaskets are not hanging into the floats' range of motion. They should not hang into the bowl even the slightest bit.

    I know this may be a dumb question, but did you make sure you put the needle valves back in and clipped them to the float flanges?
    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

    • #3
      Originally posted by CatatonicBug View Post
      You say you dipped them?? Did you replace the butterfly shaft seals? Dipping will destroy those.

      As for the leaking, try tapping the bottoms of the float bowls with a screwdriver handle and see if the floats are just stuck. If that doesn't work, verify that the bowl gaskets are not hanging into the floats' range of motion. They should not hang into the bowl even the slightest bit.

      I know this may be a dumb question, but did you make sure you put the needle valves back in and clipped them to the float flanges?
      butterfly shaft seals you say?! i guess ill be replacing those soon.

      I had set the floats to spec and thats when they leaked. I adjusted them and checked and adjusted them and checked until the leaking stopped. One of them is way out of spec. Is this going to cause an issue?

      I put the needle valves in but I don't think there are clips or float flanges.

      Comment

      • #4
        Which type of float are you using and which spec did you set your float height to? They are different and if the needle isn't shutting the flow of fuel off when the float is at the correct height, you will end up with fuel flowing when/where it shouldn't. My needles have the soft tips, some don't. Many people have experienced rubber deterioration on some of the carb parts after soaking the carbs during cleaning. I used a Gunk soaker/cleaner and just dumped the entire carb group in after removing the jets and I've had no problem with any of the rubber parts. I was VERY careful to ensure I had the float height correct, going over it three times and making sure my measurements were correct. My bike runs great and I have absolutely no fuel leaks or spills. You may have some particles keeping the needles from seating properly also. Don't torch the bike yet.
        Can't beat the smell of gas & oil

        Comment

        • #5
          are u connecting the fuel line
          to the bottom fuel 't's and not the top vent tubes?
          pete


          new owner of
          08 gen2 hayabusa


          former owner
          1981 xs1100 RH (aus) (5N5)
          zrx carbs
          18mm float height
          145 main jets
          38 pilots
          slide needle shimmed .5mm washer
          fitted with v/stax and uni pod filters

          [url]http://www.youtube.com/watch?v=3pA8dwxmAVA&feature=mfu_in_order&list=UL[/url]

          Comment

          • #6
            Good call Pete
            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.

            Comment

            • #7
              Originally posted by petejw View Post
              are u connecting the fuel line
              to the bottom fuel 't's and not the top vent tubes?
              My first thought as well.
              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
                Mine also except the comment
                it pours out of the 4 little hole on the airbox side of the carbs.
                suggest later carbs. No vent tee
                79SF
                XJ11
                78E

                Comment

                • #9
                  I believe some pictures are in order here.
                  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.

                  Comment

                  • #10
                    Yup pics needed. 4 little holes could include the kidney shaped vent as well. Little in relation to what? I guess.
                    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

                    • #11
                      "Which type of float are you using and which spec did you set your float height to? They are different and if the needle isn't shutting the flow of fuel off when the float is at the correct height, you will end up with fuel flowing when/where it shouldn't. My needles have the soft tips, some don't. Many people have experienced rubber deterioration on some of the carb parts after soaking the carbs during cleaning. I used a Gunk soaker/cleaner and just dumped the entire carb group in after removing the jets and I've had no problem with any of the rubber parts. I was VERY careful to ensure I had the float height correct, going over it three times and making sure my measurements were correct. My bike runs great and I have absolutely no fuel leaks or spills. You may have some particles keeping the needles from seating properly also. Don't torch the bike yet."

                      The floats are brass with two cream filled doughnut shaped floats and a little metal tab for adjusting the height. (http://i456.photobucket.com/albums/q...s/STH70881.jpg) The needles have metal tips. I am positive the needles and seats are clean.
                      I was using 1" for the float height. The spec sheet I had said between .972 and 1.051".

                      The gas was coming out from the air intake/ vacuum holes located at 4 o'clock looking at the air box side of the carb. down and to the right from the 12 o'clock kidney shaped hole.
                      (http://i1188.photobucket.com/albums/...y/photo1-4.jpg)

                      I have two vent tee's and the gas was coming out of the #1 & #2 tee before i adjusted the float height.

                      I got the gas to stop pouring out by adjusting the float heights. But I am worried that they are only set high enough to stop a leak and too high for the bike to run right.

                      http://i1188.photobucket.com/albums/...y/photo3-1.jpg http://i1188.photobucket.com/albums/...y/photo2-4.jpg

                      Comment

                      • #12
                        You've got at least one damaged float, so if the pic is typical of them that's your problem....

                        It looks like somebody applied compressed air to the carbs when they were assembled and partially collapsed the floats. That 'concave' side of the float should be convex. Some have had limited success in fixing these, but generally replacement is needed. You can get new ones here: http://www.mikesxs.net/products-35.html#products, part #20-6500. You can swap the brass floats out for the later plastic ones, part #20-6502 but you need to set float height to the later spec (.906" +/- .020"). If you change types, you have to change all the floats; no mixing types.
                        Last edited by crazy steve; 01-28-2012, 10:48 AM.
                        Fast, Cheap, Reliable... Pick any two

                        '78E original owner - resto project
                        '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
                        '82 XJ rebuild project
                        '80SG restified, red SOLD
                        '79F parts...
                        '81H more parts...

                        Other current bikes:
                        '93 XL1200 Anniversary Sportster 85RWHP
                        '86 XL883/1200 Chopper
                        '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
                        Cage: '13 Mustang GT/CS with a few 'custom' touches
                        Yep, can't leave nuthin' alone...

                        Comment

                        • #13
                          Those are early carbs (78-79) and Steve is right, that float most definitly looks to be damaged.
                          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.

                          Comment

                          • #14
                            Originally posted by crazy steve View Post
                            You can swap the brass floats out for the later plastic ones, part #20-6502 but you need to set float height to the later spec (.906" +/- .020").
                            I did NOT know you had to change float height to the later measurement if your changed float types!

                            Never heard that before.
                            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

                            • #15
                              Originally posted by natemoen View Post
                              I did NOT know you had to change float height to the later measurement if your changed float types!

                              Never heard that before.
                              Different float shape, material, and design, different height...
                              Fast, Cheap, Reliable... Pick any two

                              '78E original owner - resto project
                              '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
                              '82 XJ rebuild project
                              '80SG restified, red SOLD
                              '79F parts...
                              '81H more parts...

                              Other current bikes:
                              '93 XL1200 Anniversary Sportster 85RWHP
                              '86 XL883/1200 Chopper
                              '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
                              Cage: '13 Mustang GT/CS with a few 'custom' touches
                              Yep, can't leave nuthin' alone...

                              Comment

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