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FET / MOSFET RR on Light Load

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    FET / MOSFET RR on Light Load

    Does anyone know how these RR's cope with less than stock load?

    Does that still lead to more being shunted back to the Stator / overheating of the stator or what?

    I'm trying to work out what would happen with this setup if you turned off the headlight (so 55w less load on the system).

    The decision I am trying to make is whether to take the headlight switch loop out of the system when installing the new parts on my Skunk which does have the headlight switch. I rarely ride with it off (only accidentally) but I have been known to forget to turn it back on occasionally.

    Cheers,

    Dan
    1980 GS1000G - Sold
    1978 GS1000E - Finished!
    1980 GS550E - Fixed & given to a friend
    1983 GS750ES Special - Sold
    2009 KLR 650 - Sold - gone to TX!
    1982 GS1100G - Rebuilt and finished. - Sold
    2009 TE610 - Dual Sporting around dreaming of Dakar.....

    www.parasiticsanalytics.com

    TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

    #2
    Hey Dan,

    Do you really need the headlight switch to work? Why not just wire it "ON" all the time? Then perhaps put in one of those relay mods that turn off the headlight when the starter is used, if you feel that is necessary.


    Thank you for your indulgence,

    BassCliff

    Comment


      #3


      I don't really need it Cliff but I want to mess with the Loom as little as possible.... I guess it might be a very simple mod such as disabling the clutch safety (i.e. the connectors are correct & just a case of plugging them in differently).

      I am also interested because of a Mod I'm doing for a friend to my old 1000G - he wants to fit HID headlight (rated 35w) to free up some power for his heated vest so this would be a similar thing to a lesser degree.

      Dan
      1980 GS1000G - Sold
      1978 GS1000E - Finished!
      1980 GS550E - Fixed & given to a friend
      1983 GS750ES Special - Sold
      2009 KLR 650 - Sold - gone to TX!
      1982 GS1100G - Rebuilt and finished. - Sold
      2009 TE610 - Dual Sporting around dreaming of Dakar.....

      www.parasiticsanalytics.com

      TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

      Comment


        #4
        Hi Dan,

        Well, all that unused power has to go somewhere. A computer fan mounted to the r/r might help, but I don't know what to do about the extra heat that might make it back to the stator. It's too bad Suzuki didn't design some oil squirters to cool the stator like they did for other engine internals on the oil cooled bikes.



        Thank you for your indulgence,

        BassCliff

        Comment


          #5
          Best to ask Pos (Jim) but I don't think the stator gets return current, I the extra power just gets shunted to ground and makes heat. The FET should be able to handle it since its designed to handle many more watts than our stators can generate.
          Ed

          To measure is to know.

          Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

          Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

          Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

          KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

          Comment


            #6
            Ed - that's the answer that I'm hoping for.....

            If it only generates heat in the new RR I'm not too worried.

            Dan
            1980 GS1000G - Sold
            1978 GS1000E - Finished!
            1980 GS550E - Fixed & given to a friend
            1983 GS750ES Special - Sold
            2009 KLR 650 - Sold - gone to TX!
            1982 GS1100G - Rebuilt and finished. - Sold
            2009 TE610 - Dual Sporting around dreaming of Dakar.....

            www.parasiticsanalytics.com

            TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

            Comment

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