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  • Fluids and plugs

    What weight oil do you guys use in your 1600s? I plan to use synthetic, had been running 10/40 in my Vulcan 800 but not sure if I should go heavier with the larger displacement and different configuration. Not used to having to deal with transfer case oil. 80/90 synthetic? Some car rear ends will leak if you use synthetic oil in them and I don't want to hurt my machine.
    Can we switch to DOT 4 brake fluid without consequences? Supposed to handle heat better.
    And finally, is there any real benefit to iridium spark plugs? What heat range?
    The only mods to the bike ( so far) is intake and pipes.

  • #2
    Full synthetic V Twin oil for wet clutch... Need high zinc content... AMSOIL V Twin, Mobil 1 V Twin, Rotella T6 all work perfect

    NAPA gold or premium oil filter (Rebranded WIX / WIX pro)

    PRESTONE SYNTHETIC DOT 4 BRAKE FLUID AND SOME EBC HH pads are a great combo

    Transfer case fluid... Mobil 1 synthetic 75w-90

    Stock NGK 5129 spark plugs gapped to. 34-.38

    LET'S RIDE

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    • #3
      DOT 4 is the recommended fluid for our bikes. You can use better fluid DOT 5.1, but DON'T use DOT 5.

      Comment


      • #4
        Is the heavier 20/50 recommended for our bikes? Here in central Kentucky we get some days of temps in the 90s but it's not like Texas or southern Florida. Seems like a lighter oil would make it to the top end faster.
        Just want to make sure she stays tip top

        Comment


        • 07 silverado
          07 silverado commented
          Editing a comment
          Technically it's 20w40, but that is not readily available

      • #5
        I've been using 20W50 for fifteen years in Northern Iowa
        With enough beer you can do anything...D.Pate

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        • #6
          I use 20w50 in Pa

          Comment


          • #7
            20w50 works just about everywhere - there are a few days in New Mexico I wouldn't be against a 20w60 though, but it's expensive.

            Comment


            • #8
              Mobile 1 20/50 VTwin oil here in Oregon.
              2000 Roadstar 1600 - BAK, Pumpless, Curt's manifold, Mikuni HSR42 Freedom Combat Pipes Jumbo Strong bags, PPG 'HellFire' Paint.

              Comment


              • #9
                I use Lucas full synthetic 20w50 in iowa, and I ride my bike down in the 30's for temps., I also use a synthetic gear fluid gl5 that I get at walmart for the transfer, ngk plugs, dot 4 brake fluid.

                Comment


                • #10
                  Lugnut mentioned using 75w90 in the transfer case then the thread moved primarily to engine oil. What is everyone else using in their transfer case? Thanks all.

                  Comment


                  • Shores
                    Shores commented
                    Editing a comment
                    75w90 synthetic in transfer case

                  • LUV4RS
                    LUV4RS commented
                    Editing a comment
                    Right on. Appreciate it Shores

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