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    Engine still bogging even after new battery

    My 86 gs 550 was bogging very badly and couldnt rev past about 7k rpm. My battery was also not holding a charge. This led me to beleive that my problem was either my stator, R/R or my battery. So just today I put my battery from my polaris snowmobile (it is same size around but about 1 inch taller) I fired the bike up (turned over and started with ease) and it idled beautifully. I let it idle for a good 10 minutes and then shut it off, waited about 30 seconds and started it back up without any problem. Next was the test drive. It ran fine and can now rev well past 7k rpm but it is still bogging quite a bit in the higher rpm (above 5ish) Anybody know what the problem could be?? My bike is stock and has a new air filter, the valves were adjusted my the previous owner about 6k miles ago. Thanks.
    Last edited by Guest; 04-04-2010, 12:23 PM.

    #2
    Some more information would be helpful...

    Model
    Year
    status of maintenance: valve adjustment, new carb O-rings, tank rust free, vacuum sync, type of air cleaner, etc,
    Mods?
    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
      Originally posted by Nessism View Post
      Some more information would be helpful...


      status of maintenance: new carb O-rings, tank rust free, vacuum sync, etc,
      Mods?
      Edit from first question
      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


        #4
        the tank is rust free. Dont know about the vacuum sync or carb o rings though.

        Comment


          #5
          Originally posted by harasyn92 View Post
          the valves were adjusted my the previous owner about 6k miles ago.
          So you have no idea about the valve clearances, either.
          http://img.photobucket.com/albums/v5...tatesMap-1.jpg

          Life is too short to ride an L.

          Comment


            #6
            you might want to put a multi meter on it while idling and at 5000 and at 8000 just to see what it is charging, simply changing a battery will not cure a bogging problem. A battery is just a storage medium for getting the bike to start, after that it is the charging system, air/fuel system and mechanical condition of the engine.

            Comment


              #7
              I just noticed this now that it is dark outside but when I rev my engine my headlight and signal lights get dimmer, not brighter. What does this mean?? Thanks

              Comment


                #8
                It means you need to read the Stator Papers, because some thing is wrong in your charging system
                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

                Comment


                  #9
                  i would see if you stator is working then check the r/r. IMO

                  Comment


                    #10
                    Originally posted by harasyn92 View Post
                    My 86 gs 550 was bogging very badly and couldnt rev past about 7k rpm. My battery was also not holding a charge. This led me to beleive that my problem was either my stator, R/R or my battery. So just today I put my battery from my polaris snowmobile (it is same size around but about 1 inch taller) I fired the bike up (turned over and started with ease) and it idled beautifully. I let it idle for a good 10 minutes and then shut it off, waited about 30 seconds and started it back up without any problem. Next was the test drive. It ran fine and can now rev well past 7k rpm but it is still bogging quite a bit in the higher rpm (above 5ish) Anybody know what the problem could be?? My bike is stock and has a new air filter, the valves were adjusted my the previous owner about 6k miles ago. Thanks.
                    My only advice is for you to carefully inspect your air box an carbs boots ,make sure they are seal properly an the clamps are tight. I have
                    the same problem with my 750 the air box rubber boots have hard an dryed out,thus not sealing around the carbs ! good luck

                    Comment


                      #11
                      Originally posted by harasyn92 View Post
                      I just noticed this now that it is dark outside but when I rev my engine my headlight and signal lights get dimmer, not brighter. What does this mean?? Thanks
                      +1: Read the Stator Papers. This symptom sounds like voltage foldback which does not help you yet. Break out the Digital multi meter and check the voltage across your battery at 1) Idle 2) 2000 rpm & 3) 5000 rpm. If the voltage value of #3 is less than #2 than you have excessive resistance in the charging circuit. A good place to start is to clean all your charging system electrical connections till they are nice & shiney. Then find the charging system & battery grounds and ensure they are nice & shiney and hooked to the same point.

                      Then read this from Posplayr for further details http://www.thegsresources.com/_forum...d.php?t=152769
                      Steve

                      1979 GS1000E (45 Yrs), 1981 GPz550 (11 Yrs)

                      Comment


                        #12
                        Almost every charging system fault starts with corrosion and bad connectors, if left unchecked expensive parts will soon begin to fail. The Stator Papers is your friend.
                        http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                        Life is too short to ride an L.

                        Comment

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