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  • #16
    My octy only has 2 gas IN nipples, 2 gas out nipples and one vac nipple?
    Originally posted by Rasputin View Post
    Are the other Octy ports blinded?
    1979 XS1100 Special (Mad Max, OEM) Current
    1980 XS1100 Special
    1990 V Max
    1982 KZ750 LTD Twin
    1986 700 FZR Yamaha Fazer (faster then expected)
    1979 XS750 Special (my 1st Special)
    1974 CB750-Four



    Past/pres Car's
    1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8

    Comment


    • #17
      There is no way you can be half a quart high on the oil without adding gas from the tank. Ther are two gas in and one gas out on an octy. One is prime, the other is run for inlets. The prime is shut off and the fuel flows back to that line via the Octy. Look up a parts fiche or a fuel diagram to see.
      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


      • #18
        Originally posted by XS1100_OEM4ME View Post
        Sorry, 2 lines from petcocks to octy IN's, 2 lines from octy OUT's, to two inline filter IN's, 2 lines from filter out to carb IN's, one vac line from octy vac port to one intake manafold vac port
        Ok, here's a thought. Crap from tank flows into octy and prevents it from shutting off fuel and gas then floods engine. It could happen I guess, probably not very likely though. Is your tank rusty?
        2H7 (79) owned since '89
        3H3 owned since '06

        "If it ain't broke, modify it"

        Comment


        • #19
          http://www.benefiscal.co.uk/imagine....yfichname=FUEL COCK - PIPING
          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


          • #20
            Originally posted by Rasputin View Post
            Are the other Octy ports blinded?
            That's all the inlets/outlets on the octy, the 'prime' hose is teed into the line from the octy to the carb....
            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


            • #21
              Problem solved

              Solved it, poor lots of beer in it, my mouth that is not the bike Got to thinking, might not have oil in the gas When I looked in the sight glass, the bike front tire was turned all the way left and locked with the key, forgot, that changes the center of gravity And the bike is always on its side stand, never center stand and no fuel leaking out of the air box and just a little in it, so I might have saved anouther 20 dollar oil filter change If so, I am going to shut off the gas while running from now on and let it run for a min or so to use up any gas left in the lines, that should stop my overflow, as I know the petcocks dont leak at all on OFF Thanks to all, sorry to even bring this up again just WTF kind of thing again!


              Originally posted by bikerphil View Post
              Ok, here's a thought. Crap from tank flows into octy and prevents it from shutting off fuel and gas then floods engine. It could happen I guess, probably not very likely though. Is your tank rusty?
              1979 XS1100 Special (Mad Max, OEM) Current
              1980 XS1100 Special
              1990 V Max
              1982 KZ750 LTD Twin
              1986 700 FZR Yamaha Fazer (faster then expected)
              1979 XS750 Special (my 1st Special)
              1974 CB750-Four



              Past/pres Car's
              1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8

              Comment


              • #22
                Originally posted by crazy steve View Post
                That's all the inlets/outlets on the octy, the 'prime' hose is teed into the line from the octy to the carb....
                The point I was trying to make exactly!
                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


                • #23
                  Ras, he simply eliminated the PRIME outlets, and then eliminated the Ts in the lines from the OCTY to the carbs.

                  Of course, oil level is not ever accurate on the side stand, in fact, when on the side stand, you should not be able to see an oil level in the sight glass. I know I never can.
                  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


                  • #24
                    If the carb floats and valves are correct you shouldn't even have to worry about the petcocks or the octy. I ran mine all the way up and back from Minnesota last summer on prime and never shut them off.

                    The diaphragm in my octy went bad right after I left Tulsa.

                    When you set the floats did you make sure that BOTH bulbs of the float were even. You need to measure both bulbs. Having one slightly higher than the other will throw the level off. And, as stated, be sure the gaskets aren't hanging on the floats.

                    That is all I can think of other than a bad valve or loose seat.
                    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


                    • #25
                      I understand what you are saying DGXSER. I just never heard it from OEM that in fact he did this. Suprising how many can not follow the flow thru piping. A more common problem than we usually chat about is all.
                      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


                      • #26
                        Octy

                        Originally posted by Rasputin View Post
                        There is no way you can be half a quart high on the oil without adding gas from the tank. Ther are two gas in and one gas out on an octy. One is prime, the other is run for inlets. The prime is shut off and the fuel flows back to that line via the Octy. Look up a parts fiche or a fuel diagram to see.
                        The Octy, when properly plumed has 2 lines from the left and right ON / OFF/ RES nipples on the petcocks directly to the 2 IN nipples on the Octy controlled at this point by a vacuum controlled shut off valve. When opened by vacuum from the 1 vac line from the Octy to 1 intake manafold nipple, fuel flows into a mixing chamber to make sure both OUT nipples have even fuel flow, those out nipples conect to 2 lines that are intrcepted by 2 "T's", one on each line, those 2 "T's" lead, 1 on line on each side back to the the PRIME nipple on each petcock, the other 2 lines (1 on each side) go to the 2 "T's" that feed the 4 carb bowls, one line to #1 & #2 carb, the other to #3 & #4 carb. I have remover the intercepting PRIME "T's" and plumed strait the the carbs adding inline filters where those 2 "Ts" and PRIME line were removed , then capped off the PRIME nipples on the L/R petcocks
                        Last edited by XS1100_OEM4ME; 01-15-2012, 08:10 PM.
                        1979 XS1100 Special (Mad Max, OEM) Current
                        1980 XS1100 Special
                        1990 V Max
                        1982 KZ750 LTD Twin
                        1986 700 FZR Yamaha Fazer (faster then expected)
                        1979 XS750 Special (my 1st Special)
                        1974 CB750-Four



                        Past/pres Car's
                        1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8

                        Comment


                        • #27
                          Originally posted by XS1100_OEM4ME View Post
                          but can someone put a Voodoo hex on a mans carbs
                          It has to be the evil Octy, anywhere near the bike it has been known to cause fits.

                          Glad you got it fixed so quickly.
                          2H7 (79) owned since '89
                          3H3 owned since '06

                          "If it ain't broke, modify it"

                          Comment


                          • #28
                            Mixing two things up

                            Originally posted by Rasputin View Post
                            There is no way you can be half a quart high on the oil without adding gas from the tank. Ther are two gas in and one gas out on an octy. One is prime, the other is run for inlets. The prime is shut off and the fuel flows back to that line via the Octy. Look up a parts fiche or a fuel diagram to see.
                            Hey Rasputin, your mixing two thing up. 1st, the reason I think I may not have gas in the oil is because I always leave my bike on the side stand, which SHOULD let any overflow of gas run back and out the airbox. 2nd, when I checked my oil level through the sight glass, I pulled the bike off the side stand to balance it, but the front wheel was locked all the way left, thus, causing me to lean the bike more to the right to balance it then if the wheel was centered
                            1979 XS1100 Special (Mad Max, OEM) Current
                            1980 XS1100 Special
                            1990 V Max
                            1982 KZ750 LTD Twin
                            1986 700 FZR Yamaha Fazer (faster then expected)
                            1979 XS750 Special (my 1st Special)
                            1974 CB750-Four



                            Past/pres Car's
                            1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8

                            Comment


                            • #29
                              Hey OEM, now I get your theory on the oil level and the wheel being turned.

                              I would disagree with the bike being on side stand changing the posibility of gas getting into the oil though. The issue is not that gas builds in the air box, it is that the gas fills the carb bowl up to the level of the carb throat. From the throat it runs either back to the air box or through the small opening under the throttle plate into the cylinder and down past the rings into the oil. So if raw gas in liquid form is showing up in the air box, it has had the opportunity to get into the cylinder and therefor the oil.

                              Yep, if your float valves are operating correctly, you should not get gas in airbox or oil. However, the OCTY is supposed to be a back up safety to that and the petcocks another back up safety. So if you have both in use and both are reasonably recently rebuilt and operating, then it is highly unlikely the fuel is flowing with the petcocks off and the engine off.

                              On interesting item with the octy though is that it links the left and right petcocks to feed both sides of the bike. Meaning, those left and right fuel inlet lines feed a common cavity that then flows fuel to both carb inlets. So if one petcock leaked, and your octy failed, you would have gas going to all four carbs.
                              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


                              • #30
                                Side stand

                                I understand the flow of gas, the side stand puts the bike and carbs in a tilted back position, thus, the gas will flow into the air box instead up hill and in to the motor. If the bike is on the center stand the carbs are in a tilted forward position, thus the gas will flow forward and into the motor instead of up hill and into the air box

                                Originally posted by DGXSER View Post
                                Hey OEM, now I get your theory on the oil level and the wheel being turned.

                                I would disagree with the bike being on side stand changing the posibility of gas getting into the oil though. The issue is not that gas builds in the air box, it is that the gas fills the carb bowl up to the level of the carb throat. From the throat it runs either back to the air box or through the small opening under the throttle plate into the cylinder and down past the rings into the oil. So if raw gas in liquid form is showing up in the air box, it has had the opportunity to get into the cylinder and therefor the oil.

                                Yep, if your float valves are operating correctly, you should not get gas in airbox or oil. However, the OCTY is supposed to be a back up safety to that and the petcocks another back up safety. So if you have both in use and both are reasonably recently rebuilt and operating, then it is highly unlikely the fuel is flowing with the petcocks off and the engine off.

                                On interesting item with the octy though is that it links the left and right petcocks to feed both sides of the bike. Meaning, those left and right fuel inlet lines feed a common cavity that then flows fuel to both carb inlets. So if one petcock leaked, and your octy failed, you would have gas going to all four carbs.
                                1979 XS1100 Special (Mad Max, OEM) Current
                                1980 XS1100 Special
                                1990 V Max
                                1982 KZ750 LTD Twin
                                1986 700 FZR Yamaha Fazer (faster then expected)
                                1979 XS750 Special (my 1st Special)
                                1974 CB750-Four



                                Past/pres Car's
                                1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8

                                Comment

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