4 wire regulator

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  • letchworth rider
    Forum Mentor
    • May 2010
    • 105

    #1

    4 wire regulator

    Thank you for reading
    81 GS750EX
    The rectifier/regulator unit on this bike has been changed in the past. It has 4 wires- 3 yellow and 1 black.
    To my knowledge this means three stator wires (yellow) and one output wire (black). The ground is through the case. All wires are 16 gauge.
    I have a separate ground wire to the battery from the regulator case, and have all 3 wires connected to the stator, with headlight circuit bypassed.
    Just hoping someone else has this type unit on their bike and it is wired the same.

    Now on to the connections! Yes, I read the Stator papers.
  • posplayr
    Forum LongTimer
    GSResource Superstar
    Past Site Supporter
    • Dec 2007
    • 23673
    • Tucson Az

    #2
    • how is the rest of your return current getting to the R/R?


    Harness B/W,
    Frame Ground,
    engine mounts to engine,
    battery cable from engine to battery then finally
    ground wire you ran from the battery to the R/R?

    Look up SPG under GS Charging Health.

    Comment

    • tom203
      Forum Guru
      Past Site Supporter
      • Aug 2010
      • 8925
      • Norway,Maine

      #3
      Here's a summary link....



      letchworth rideri: if you still got acceptable charging, that's great, but consider improving your odds by upgrading wiring and maybe opting for new r/r technology which you might have not noticed.
      1981 gs650L

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

      Comment

      • Redman
        Forum LongTimer
        Past Site Supporter
        Super Site Supporter
        • Mar 2004
        • 13762
        • Michigan, west Michigan

        #4
        Originally posted by letchworth rider
        Thank you for reading
        81 GS750EX
        The rectifier/regulator unit on this bike has been changed in the past. It has 4 wires- 3 yellow and 1 black.
        To my knowledge this means three stator wires (yellow) and one output wire (black). The ground is through the case............
        .............I have a separate ground wire to the battery from the regulator case...............
        If there is only those 4 wires, and it works... that must be what those are.

        And, yes, adding your own ground wire is a good idea, especially if R/R is mounted to battery box, the battery box may not be well grounded.
        (and needs to be, for the R/R and the starter solenoid).
        Bikes
        Had 650G & 850G. GK since 2005. BOTM 850G 6/2024 , GK 9/2015​

        Comment

        • letchworth rider
          Forum Mentor
          • May 2010
          • 105

          #5
          Yes, connections is where it is at now. Upgrade grounds and feeds. Now if I could get all the harness routed correctly, I would be happy. Been apart way too long. Searching for some good pics of harness routing.

          Comment

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