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    Fuel Delivery issues

    Hi all! So my bike actually starts now, except it only starts after having some carb clean sprayed into cylinders. it dies after about 2 seconds, even on PRIme, and my float bowls are full. I already rebuilt the carbs properly, no clogged jets, yet it's like the bike isn't managing to pull fuel out of the float bowls into the cylinder. Is this a vacuum issue? Or is the faliure within the carbs?

    #2
    Properly means you followed the tutorial?
    Is the air box on?
    1978 GS 1000 (since new)
    1979 GS 1000 (The Fridge, superbike replica project)
    1978 GS 1000 (parts)
    1981 GS 850 (anyone want a project?)
    1981 GPZ 550 (backroad screamer)
    1970 450 Mk IIID (THUMP!)
    2007 DRz 400S
    1999 ATK 490ES
    1994 DR 350SES

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      #3
      i can't find a tutorial specific to my model of carb, but i followed the next closest one as closely as I could, while using the manual diagrams as a cross reference. The airbox is on correctly and i tested it for vacuum leak at the intake boots on both sides of the carb.

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        #4
        Sounds like the choke system isn't working. Did you make sure the choke pickup tube is open and the passage clear to the plungers? Also, the passage in the float bowls where the pickup tubes insert?
        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
          I never thought about checking the choke system at all! to check the system, can i remove the plungers and inspect them while adjusting the choke?

          Comment


            #6
            Check the rebuild tutorial linked in my signature and make sure you go through each element. Even if your carbs are different the basic function is the same.
            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
              Funny you mention that, because the tutorial I followed was ​the one from your bio!

              Comment


                #8
                Originally posted by JAPA View Post
                Funny you mention that, because the tutorial I followed was ​the one from your bio!
                Based on your comment about the choke plungers it seems you never removed them.
                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


                  #9
                  These are the plungers, right? They stay attached to the choke cables so i have to remove them to detach carb. They have veen removed a few times now, but i meant i never checked the passages at all.Snapchat-866295356.jpg

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