sH775 mosfet regulator

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  • Guest

    #1

    sH775 mosfet regulator

    How do I test this before installing it on the bike. i am replacing the electrosport regulator that I bought 15 years ago.
  • jsandidge
    Forum Sage
    Past Site Supporter
    • Jun 2013
    • 1482
    • Norfolk, Virginia

    #2
    Originally posted by bigbabee
    How do I test this before installing it on the bike. i am replacing the electrosport regulator that I bought 15 years ago.
    Don't know how to test it, but if it really is an SH775, it is a series regulator, not mosfet. Series is what you want though.
    https://drive.google.com/open?id=0B9zH8w8Civs8ejBJWjdvYi1LNTg&resourcekey=0-hlJp0Yc4K_VN9g7Jyy4KQg&authuser=fussbucket_1%40msn.com&usp=drive_fs
    1983 GS750ED-Horsetraded for the Ironhead
    1981 HD XLH

    Drew's 850 L Restoration

    Drew's 83 750E Project

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    • posplayr
      Forum LongTimer
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      • Dec 2007
      • 23673
      • Tucson Az

      #3
      Originally posted by jsandidge
      Don't know how to test it, but if it really is an SH775, it is a series regulator, not mosfet. Series is what you want though.
      Yep
      The SH-775 is SERIES based on an SCR design.
      The Compufire is SERIES based on a MOSFET design
      What people call "MOSFET" is SHUNT based on MOSFET design.

      Modern regulators such as MOSFET and SERIES R/R's have a micro controller built in to make the R/R operate. It is hard to test without having the 3 phase AC excitation.

      The tests in the manual are only for old style (SCR SHUNT) regulators(including Electrosport, Ricks, Honda, most of the chinese stuff you see) and do not apply to anything new.
      Last edited by posplayr; 08-18-2015, 04:22 PM.

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      • Guest

        #4
        polaris oem # 4012941 CAM00062.jpg

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        • jsandidge
          Forum Sage
          Past Site Supporter
          • Jun 2013
          • 1482
          • Norfolk, Virginia

          #5
          Yep, that's the good series R/R.
          https://drive.google.com/open?id=0B9zH8w8Civs8ejBJWjdvYi1LNTg&resourcekey=0-hlJp0Yc4K_VN9g7Jyy4KQg&authuser=fussbucket_1%40msn.com&usp=drive_fs
          1983 GS750ED-Horsetraded for the Ironhead
          1981 HD XLH

          Drew's 850 L Restoration

          Drew's 83 750E Project

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

            #6
            Originally posted by bigbabee
            polaris oem # 4012941 [ATTACH=CONFIG]41568[/ATTACH]
            check the partnumber to be sure; it should say SH775XX

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            • Guest

              #7
              My GS1000 has a 15 A main fuse. would it be safe for me to wire this to my battery using 12 gauge wire and a 20A circuit breaker?

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

                #8
                Originally posted by bigbabee
                My GS1000 has a 15 A main fuse. would it be safe for me to wire this to my battery using 12 gauge wire and a 20A circuit breaker?
                If by "safe" you mean, will not melt any wires? Then yes you are OK, but I would not recommend it.

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                • Grimly
                  Forum Guru
                  Past Site Supporter
                  Super Site Supporter
                  • Sep 2012
                  • 5762
                  • Ireland

                  #9
                  Originally posted by bigbabee
                  polaris oem # 4012941 [ATTACH=CONFIG]41568[/ATTACH]
                  Hmmm.... did you buy it from a pukka Polaris dealer, or just some seller on ebay who quoted the Polaris OEM part number?
                  If the latter, it's probably a fake.
                  <edit>
                  I just noticed you said in another post you bought if from Motosport.com - in which case it should be genuine.
                  Last edited by Grimly; 08-18-2015, 06:13 PM.
                  Dave
                  '79 GS850GN '80 GS850GT
                  Only a dog knows why a motorcyclist sticks his head out of a car window

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                  • Guest

                    #10
                    If you are blowing fuses you probably need to clean the ignition switch and then stay with your factory fuse size.

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

                      #11
                      Originally posted by bigbabee
                      My GS1000 has a 15 A main fuse. would it be safe for me to wire this to my battery using 12 gauge wire and a 20A circuit breaker?
                      Best to stick with original layout- study this explanation to understand why.

                      1981 gs650L

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

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