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Bike running in 3 cylinders

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    Bike running in 3 cylinders

    My gs550t is running only on 3 cylinders. Theres spark in every cyl, and the carbs were rebuilt last week. Im starting to think it may be something mechanically wrong like a valve seal or something not seating all the way. When i start the bike i can literally touch the cylinder #3 exhaust with my bare hand. Spark plugs dont seem fouled in either cylinder. Any help is greatly appreciated.

    #2
    When you rebuilt the carbs what was done? Did you follow the carb rebuild tutorial as linked in my signature? Hold the pilot jets up to a light to be sure they are open? Remove the pilot screws before dipping the carb bodies?
    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

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      #3
      Did you/someone who knows what they're doing clean/rebuild the carbs? Hang around here more than 30 minutes and you'll find many, many times not cleaning/rebuilding carbs properly is the problem.

      Open up the bowl drain on 3, confirm it's getting fuel. If it isn't, check the float isn't stuck or incorrectly set.
      -Mal

      "The only reason for time is so that everything doesn't happen at once." - B. Banzai
      ___________

      78 GS750E

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        #4
        I did this last night with every carb, i checked pilot jets and everything. The carbs were fully dissembled, soaked in chem dip and everything was replaced.

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          #5
          in another thread you mention needing shims....
          1983 GS 1100 ESD :D

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