charging system testing

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  • last337
    • Jan 2026

    #1

    charging system testing

    So I got my bike going and have the new battery charged and all was great but then the battery was dead again. I may have fried the charging system when I tried to jump start it a while back but cant remember how to trace back which component is dead. I tested at the battery and after revving over 6k I still just see a solid 12.6 v. Doesnt it go from stator to reg/rect to battery? Shouldnt the reg/rec just put off 12.6 to battery and dump the rest or am I thinking about this wrong? Where should I check for increase in voltage produced by stator and what should I expect to see?

    Thanks!
  • Dogma
    Forum Guru
    • Sep 2007
    • 7143
    • Mason, OH (SW)

    #2
    You need to find the "Stator Papers" on the GSR home page (not in the forum), or better yet, find Posplayr's updated version.
    Dogma
    --
    O LORD, be gracious to me; heal me, for I have sinned against you! - David

    Skeptical scrutiny is the means, in both science and religion, by which deep insights can be winnowed from deep nonsense. - Carl Sagan

    --
    '80 GS850 GLT
    '80 GS1000 GT
    '01 ZRX1200R

    How to get a "What's New" feed without the Vortex, and without permanently quitting the Vortex

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    • JJ

      #3
      Originally posted by last337
      So I got my bike going and have the new battery charged and all was great but then the battery was dead again. I may have fried the charging system when I tried to jump start it a while back but cant remember how to trace back which component is dead. I tested at the battery and after revving over 6k I still just see a solid 12.6 v. Doesnt it go from stator to reg/rect to battery? Shouldnt the reg/rec just put off 12.6 to battery and dump the rest or am I thinking about this wrong? Where should I check for increase in voltage produced by stator and what should I expect to see?

      Thanks!
      A "solid 12.6V" at 6K RPM isn't good. It should be around 14V

      Comment

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

        #4
        Your charging transgression would not have damaged the stator and more likely blew the r/r.

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