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    Leaky carb

    OK, small issue I'm sure, but I rebuilt my petcock while doing my restoration and this is my problem: I have BS34s from wiredgeorge and everything was fine until I rebuilt the petcock and re-installed everything. Now when I park it I get gas slowly dripping out of the middle-right carb air filter. Even after I pinch the fuel line.
    (When I remove the fuel line from the petcock I get a tiny trickle in ON and RES and a flow from PRIME)
    Could there be something wrong with my carbs? They were fine two months ago...

    #2
    Originally posted by AirCooledFour View Post
    OK, small issue I'm sure, but I rebuilt my petcock while doing my restoration and this is my problem: I have BS34s from wiredgeorge and everything was fine until I rebuilt the petcock and re-installed everything. Now when I park it I get gas slowly dripping out of the middle-right carb air filter. Even after I pinch the fuel line.
    (When I remove the fuel line from the petcock I get a tiny trickle in ON and RES and a flow from PRIME)
    Could there be something wrong with my carbs? They were fine two months ago...
    There should be NO gas coming out with the petcock in ON and RES. You may also be getting gas down the vacuum line and into the engine/carbs that way.

    Regarding those georgie carbs, good luck with that; lots of reported complaints with the quality of work he does.
    Ed

    To measure is to know.

    Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

    Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

    Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

    KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

    Comment


      #3
      Dry vacuum line

      The vacuum line is dry... I read elsewhere here that the type of filter used could have some issues? I am using one of those clear glass ones that can be opened up and cleaned. 1/4 inlet-outlet. Maybe I should have left the petcock alone... I decided to rebuild it "just because" Anybody have a work around?

      Originally posted by Nessism View Post
      There should be NO gas coming out with the petcock in ON and RES. You may also be getting gas down the vacuum line and into the engine/carbs that way.

      Regarding those georgie carbs, good luck with that; lots of reported complaints with the quality of work he does.

      Comment


        #4
        Filters can cause problems unless they are designed for a gravity feed system (most automotive filters are not suitable), plus they sometimes force the fuel line into a loop. Can't think of why this would cause the carbs to overflow though.
        Ed

        To measure is to know.

        Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

        Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

        Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

        KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

        Comment


          #5
          On & Off

          What are the options for a new universal On & Off / Res petcock? Are they preferred? Who has them?

          Comment


            #6
            Diagram?

            I know what I need, some kind of detailed diagram of a '77 petcock, I might have rebuilt it backwards?

            Originally posted by AirCooledFour View Post
            What are the options for a new universal On & Off / Res petcock? Are they preferred? Who has them?

            Comment


              #7
              Originally posted by AirCooledFour View Post
              I know what I need, some kind of detailed diagram of a '77 petcock, I might have rebuilt it backwards?
              Here you are...




              There are mixed reviews regarding the rebuild kits. Getting the metal surfaces very smooth seems to be very important. If you spent the money on a new one, you wouldn't have to worry about it for another 30 years or so. Just a thought.


              Thank you for your indulgence,

              BassCliff

              Comment


                #8
                Just buy a new petcock
                Did the carbs run ok since you got them back?
                1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
                1985 GS1150ES stock with 85 Red E bodywork.

                Comment


                  #9
                  Oh yes

                  I have no complaints about the BS34s I got from wiredgeorge. Absolutely flawless.
                  I think I will get this http://www.z1enterprises.com/detail.aspx?ID=1716 petcock from Z1, I don't need the big reserve either. I watch the miles and just fuel up when I get to around 150 miles.

                  Originally posted by chef1366 View Post
                  Just buy a new petcock
                  Did the carbs run ok since you got them back?

                  Comment


                    #10
                    Originally posted by AirCooledFour View Post
                    I have no complaints about the BS34s I got from wiredgeorge. Absolutely flawless.
                    I think I will get this http://www.z1enterprises.com/detail.aspx?ID=1716 petcock from Z1, I don't need the big reserve either. I watch the miles and just fuel up when I get to around 150 miles.
                    Don't forget to check the bolt spacing on your old petcock before ordering. The early GS's typically took the large lever petcock with different spacing from the later bikes with the small lever petcock.

                    Cycle Parts Nation has an OE petcock for $68. Not cheap but could be worse... http://www.cyclepartsnation.com/page.../1/Suzuki.aspx
                    Last edited by Nessism; 03-15-2010, 09:32 AM.
                    Ed

                    To measure is to know.

                    Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                    Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                    Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                    KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

                    Comment


                      #11
                      Ditto what Aircooledfour said about George Lesho...I got mine done before i had found the forum and was a newbie to repairing cycles two years ago. They have been flawless and i have no complaints except had i known about the forum and how to do it myself it would have been way cheaper. Cant fault him on that either... he has to spend his time, etc, etc, and thats how he makes his living.
                      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                      Comment


                        #12
                        Originally posted by chuck hahn View Post
                        except had i known about the forum and how to do it myself it would have been way cheaper.
                        Kind of brings back memories doesn't it?
                        De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

                        http://www.thegsresources.com/_forum...35#post1625535

                        Comment


                          #13
                          yeah only wish i had written down the settings you told me..LOL I should have you Pm me those to add to my tech notes file.
                          MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                          1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                          NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                          I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                          Comment

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