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gas in cylander 2 header

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    gas in cylander 2 header

    so I started up my bike i have been working on (81 GS750E) I rebuilt carbs with o-rings and dipped them and blew them out with air the carb cleaner, new air filter, sparks, battery, valve adjustment. so i start it up and bang it starts right up no problems. then i shut it down and looked down to see it leaking I looked and it was gas coming from the header. So I checked the spark plug and it sure enough is firing. So its obviously getting fuel, and spark, and the air box is off so...now im just confuessed my next guess was compression but my tester doesnt have an adapter to fit my holes so I just put some marvel mystery oil in there for tonight i figured it cant hurt any thing.

    PS how do I mount the idle control cause I cant figure it out i have 3 racks of carbs 1 from a 650 and 1 from a 550 so the mounts for the carbs are diff so i cant figure it out.

    Thank you
    Jake

    #2
    Your petcock may be leaking down the vacuum line and into #2 where it connects to the carbs. A clear tube in place of the vacuum line is helpful to see if that is occuring.
    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
      The idle control knob should be on the "gang bracket" for the rack itself. IIRC...there are two screws that hold it to the main bracket and not the carb bodies, but it has been awhile...

      Have a look: http://www.bikebandit.com/1981-suzuk...s750ex/o/m6107

      Comment


        #4
        Originally posted by Nessism View Post
        Your petcock may be leaking down the vacuum line and into #2 where it connects to the carbs. A clear tube in place of the vacuum line is helpful to see if that is occuring.
        Totally forgot about the vacuum line i just hooked it up and forgot about it running into carb two...funny thanks for the reminder Nessism.

        Originally posted by Dave8338 View Post
        The idle control knob should be on the "gang bracket" for the rack itself. IIRC...there are two screws that hold it to the main bracket and not the carb bodies, but it has been awhile...

        Have a look: http://www.bikebandit.com/1981-suzuk...s750ex/o/m6107
        my problem is I have the bracket that you bolt into the bowl but i cant see the other bracket on this image. I already tried looking at this exact chart and couldnt get it....

        Comment


          #5
          the main bracket on the bottom of the carbs doesnt have anything to hook the idle control up to. so i dont know what to do.

          Comment


            #6
            Originally posted by nisom512 View Post
            the main bracket on the bottom of the carbs doesnt have anything to hook the idle control up to. so i dont know what to do.
            If you would post some high resolution photos of your carbs so we can see what's going on that would help greatly.
            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


              #7
              Originally posted by Nessism View Post
              If you would post some high resolution photos of your carbs so we can see what's going on that would help greatly.
              Was already in the process...... haha

              Comment


                #8
                Here is the part with the rail that doenst have a mount

                Comment


                  #9
                  That piece holding the adjustment screw should be held in place with that rusty drain bowl screw. The adjustment screw then threads into a piece on the throttle shaft.
                  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


                    #10


                    the other plate is off my 650 rack.

                    Comment


                      #11


                      I dont see the mounting thing you speak of Ness

                      Comment


                        #12
                        Originally posted by Nessism View Post
                        That piece holding the adjustment screw should be held in place with that rusty drain bowl screw. The adjustment screw then threads into a piece on the throttle shaft.
                        there is no piece on the throttle shaft that i can screw it into. thats my problem. normally there is a mound like in my other pics i uploaded that it screws into but no on this bike so im confused.

                        Comment


                          #13
                          so no one knows?

                          Comment


                            #14








                            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


                              #15
                              Originally posted by Dave8338 View Post
                              The idle control knob should be on the "gang bracket" for the rack itself. IIRC...there are two screws that hold it to the main bracket and not the carb bodies, but it has been awhile...

                              Have a look: http://www.bikebandit.com/1981-suzuk...s750ex/o/m6107
                              If you go to this link and click on CARBURETOR, then look at the Large Image, it is part #59. Unfortunately, it is listed as discontinued.

                              Comment

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