Charging

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  • wdavie
    • Jan 2026

    #1

    Charging

    Hi guys I had problems with my bike not charging the battery properly. Cleaned all the earths etc and now have 13.5 on meter when testing it. Is this enough or should it be higher. Thanks
    Wayne
  • cowboyup3371
    Forum LongTimer
    Past Site Supporter
    • Apr 2010
    • 13996
    • In Ohio Now

    #2
    Sounds about right from what I saw. Have you gone through the stator papers though?
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    • jbs80106

      #3
      Its better than a continuous drain, but is that 13.5V measurement with the RPMs up or at idle? Need to give her some throttle to properly test the stator/reg-rect for proper charging voltage back at the battery. If only 13.5 when reved that might be too low?

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      • posplayr
        Forum LongTimer
        GSResource Superstar
        Past Site Supporter
        • Dec 2007
        • 23673
        • Tucson Az

        #4
        http://www.thegsresources.com/statorpapers4.php

        Link to Revised PHASE A of Stator Pages:
        Last edited by posplayr; 11-16-2015, 06:29 PM.

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        • wdavie

          #5
          Hi guys it was reading 13.5 with the revs high, not sure if they were as high as 5K though as I don't have a rev counter fitted to bike. Will go through stator paper test tommorow. Thanks again

          Comment

          • posplayr
            Forum LongTimer
            GSResource Superstar
            Past Site Supporter
            • Dec 2007
            • 23673
            • Tucson Az

            #6
            Originally posted by wdavie
            Hi guys it was reading 13.5 with the revs high, not sure if they were as high as 5K though as I don't have a rev counter fitted to bike. Will go through stator paper test tommorow. Thanks again
            if so then probably bad connections between the positive side of battery and the R/R.

            If it went up to 14V and then started backing down at even higher RPM that is "fold back" associated with poor connections. Voltage at teh batter ydrops as youi try to push curretnt to it from a fixed voltage output at the R/R

            Comment

            • Steve
              GS Whisperer
              • Jun 2005
              • 35924
              • southwest oHIo

              #7
              Originally posted by wdavie
              Hi guys it was reading 13.5 with the revs high, not sure if they were as high as 5K though as I don't have a rev counter fitted to bike.
              Is the bike capable of being ridden? Get it up to 70 mph (110 kph) and notice the sound of the engine. THAT is 5,000 rpm.

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              • wdavie

                #8
                Originally posted by posplayr
                if so then probably bad connections between the positive side of battery and the R/R.

                If it went up to 14V and then started backing down at even higher RPM that is "fold back" associated with poor connections. Voltage at teh batter ydrops as youi try to push curretnt to it from a fixed voltage output at the R/R
                Hi it stayed static at about 13.5V didn't drop down at all when throttle held steady.

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                • posplayr
                  Forum LongTimer
                  GSResource Superstar
                  Past Site Supporter
                  • Dec 2007
                  • 23673
                  • Tucson Az

                  #9
                  Originally posted by wdavie
                  Hi it stayed static at about 13.5V didn't drop down at all when throttle held steady.
                  fold back means
                  "drops with RPM"

                  NOT

                  "drops with time"

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                  • Big T
                    Forum LongTimer
                    Past Site Supporter
                    Super Site Supporter
                    • Mar 2005
                    • 12391
                    • West Slope, OR

                    #10
                    Next thing to try is to run a ground wire directly from the battery negative terminal to the R/R and retest
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