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    83 gs750 charging issues

    Hello,

    I have an 83 gs750 that wasn't charging. I replaced the stator and rectifier and it seems to be charging now. With the bike at idle I get a reading of 13.61 on the multimeter from the battery. I wanted to check and see if this is good enough? It seems like its on the low end but acceptable.

    Thanks, Dan

    #2
    At idle that's ok. But why not be brave and do this Quick Test in this link (report all 6 results) and find out more!

    1981 gs650L

    "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

    Comment


      #3
      Originally posted by rushton75 View Post
      Hello,

      I have an 83 gs750 that wasn't charging. I replaced the stator and rectifier and it seems to be charging now. With the bike at idle I get a reading of 13.61 on the multimeter from the battery. I wanted to check and see if this is good enough? It seems like its on the low end but acceptable.

      Thanks, Dan
      What are you getting at 5k? It should be somewhere between 14 and 15.5v.
      :cool:GSRick
      No God, no peace. Know God, know peace.

      Eric Bang RIP 9/5/2018
      Have some bikes ready for us when we meet up.

      Comment


        #4
        It drops on the way up to 5k down to about 13.2

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          #5
          Everything else checks out though. The battery is more charged after running the bike even at 5k rpm for a minute

          Comment


            #6
            Originally posted by rushton75 View Post
            It drops on the way up to 5k down to about 13.2
            This indicates problems.
            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
              Dirty connections; did you clean the fuse box? Add SPG?

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                #8
                Rewire the charging system to send the stator wires directly into the R/R?
                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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                  #9
                  I read that people had done that. Why do the original stator wires go up under the gas tank and then back down? When I replaced the stator the connections at the end under the tank were pretty corroded and burnout so I cut the wires on the bike side back an inch to where the wire looked clean and attached new connectors. I used connectors from the hardware store that matched but weren't copper.

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                    #10
                    I had cleaned the fuse box and put in new spark plugs. Fuse box looks free from corrosion. When i put the new stator in the wires at the end where it connects to the bike under the gas tank were pretty corroded and burnt out. I cut the wires back and inch on the bike side and put on new connectors from the hardware store. Do you agree with Nassism that wiring the stator directly to regulator is a good idea?

                    Thanks

                    Comment


                      #11
                      There are about 10,000 posts here in the archives about how to fix the GS charging system.

                      1) wire stator directly into the R/R. Suzuki routed one leg of the stator feed through the hand control and this must be eliminated and cleaned up.

                      2) Improve R/R ground. Running the ground straight to the battery is the simple way.

                      3) Power output from R/R can feed into the old harness, into the fuse box, but you must check for voltage loss through the path on the way to the battery and fix/clean the connectors. Take your volt meter and put one probe on the R/R output wire and another on the + battery post and read the voltage. Then compare the same voltage against a reading straight across the battery. If you are reading more than .2 volts loss you have too much and the connectors must be cleaned/improved.

                      Extra bonus points for installing a SH775 or Compufire R/R. Do a search and learn how these devices help protect your stator from overheat damage. Credit to Posplyer for educating the forum on this matter.
                      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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