Trip on Sun HELP

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  • Geo
    • Mar 2026
    #1

    Trip on Sun HELP

    Hi All
    Getting ready to go on a 2 day junket, and am concerned a little about the charging sys.
    Have a 80 550E ,replaced the R/R with one that has a sensor wire. The voltage at the Battery will not go above 13.4 V even at 5k RPM. Is this normal . On Bikecliffs' quick check page it indicates the Voltage should be about 14v, however if the R/R has a sensor wire and its from a different bike should I still get 14-15 at 5k.
    Am I OK to go on my hop.

    THANKS
    Tags: None
    • SqDancerLynn1
      #2
      Make sure you have a good ground between the reg and the battery. Check voltage between the battery + and the fuse block + reading should be less than .5 volts

        Comment

        • Geo
          #3
          I have one ground going directly to the battery and the other to the frame.

            Comment

            • bonanzadave
              Forum Guru
              Past Site Supporter
              Super Site Supporter
              • Jul 2006
              • 9624
              • Minnesota
              #4
              13.4 VDC is not a good charging voltage. Why did you replace the RR ? What was the charging voltage with the old RR ? Did you check the AC output on each of the three legs of the stator ? I would be leery of any trips too far from home.
              82 1100 EZ (red)

              "You co-opting words of KV only thickens the scent of your BS. A thief and a putter-on of airs most foul. " JEEPRUSTY

                Comment

                • Geo
                  #5
                  I'm getting 60 v AC on all three legs of stater...The R/R was replaced because of poor output 12 v?

                    Comment

                    • Geo
                      #6
                      The charging volt seems to top out at 2500 . Have a spare SH543-12 but I don't see it listed under compatible R/R.
                      Thanks
                      Last edited by Guest; 05-20-2012, 05:27 AM.

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                        • tom203
                          Forum Guru
                          Past Site Supporter
                          • Aug 2010
                          • 8925
                          • Norway,Maine
                          #7
                          Originally posted by Geo
                          The charging volt seems to top out at 2500 . Have a spare SH543-12 but I don't see it listed under compatible R/R.
                          Thanks
                          I have a SH-541-12 unit- two green, two red/white,3 yellow and a black sense wire- is your unit similar? where did you connect sense wire on this other R/R ( the one that you are testing now) ?
                          1981 gs650L

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

                            Comment

                            • Geo
                              #8
                              Hi All
                              My apologies for not updating sooner... life got in the way and haven't been riding.
                              So ..In spite lower than normal voltage, I did go on my 2 day 600 mile ride and experienced no electrical problems.
                              Two weeks ago I finally had the time to dig into the system and I did find 2 problems.
                              First..
                              When I replaced the R/R I used a 4 flat male to female connector(used for trailers) with conductive grease on the pins and some of the existing connectors ...Bad move with the grease and original connectors .
                              Replaced all the connectors with good quality flat spade connectors with a dab of anti-oxidant grease.
                              Second..Checked all my soider splices and found 1 bad joint (loose) .
                              Now the system is happy and all the readings are textbook .
                              Thanks for all the help, without it, I wouldn't have found my stupid mistakes.
                              Geo

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