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HSR42 TPS mod

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  • HSR42 TPS mod

    So while my wife and I were in Cabo for 2 weeks I shipped my HSR42 off to Duke in NM and had him add on a TPS. I haven't tried it out yet but I'm sure it will work just fine! He got the TPS for me, made the bracket assembled and shipped it back. He found me a deal on the TPS sensor and I was into it for around $120 with paying for shipping both ways. Check it out...

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    2000 Roadstar 1600 - BAK, Pumpless, Curt's manifold, Mikuni HSR42 Freedom Combat Pipes Jumbo Strong bags, PPG 'HellFire' Paint.

  • #2
    Awesome!! Nice work

    Comment


    • #3
      On a stock internal bike what is the benefit to a hsr42?
      "I'm Ricky Bobby. If you don't chew Big Red.....then Fuck You"

      Comment


      • #4
        Originally posted by Lug Nut View Post
        On a stock internal bike what is the benefit to a hsr42?
        You will get some argument from certain people that are really good at setting up a CV carb, but I feel they are snappier off the bottom, flow more air/fuel and are simpler to tune effectively. Mikuni claims higher HP, but I've never dynoed one but seat of the pants I think they do add some HP and are snappier when you crank it on.
        2000 Roadstar 1600 - BAK, Pumpless, Curt's manifold, Mikuni HSR42 Freedom Combat Pipes Jumbo Strong bags, PPG 'HellFire' Paint.

        Comment


        • #5
          Looks great Jaybo. Nicely done Duke!

          Comment


          • #6
            That is nice! I put two 42’s on my bike but went back to the cv because the bike did not like to idle. It was all over the place when you got off the throttle. The cv carb works awesome so I’m sticking to it.

            Comment


            • Jaybo
              Jaybo commented
              Editing a comment
              No problems for me with idling, but I do adjust it here and there and have it hanging just behind my air cleaner to make it simple to find.

          • #7
            i just swapped out my CV to an HSR42. def. does feel like a nice performance upgrade (seat of your pants) and i like the simplicity of it. yes, idle adjustment is very sensitive,and am still trying different Pilot Mixture screw settings. Still getting somewhat of a POP just after decel when i get back to the throttle. Thinking might need a valve adjustment. What is the reason or bennefit of adding a Throttle Positioning Sensor ?

            Comment


            • Jaybo
              Jaybo commented
              Editing a comment
              It adjusts the timing to match the RPM's. It improves on the 42 even more.

          • #8
            Originally posted by gary1717 View Post
            Thinking might need a valve adjustment.
            Why do you think you need to adjust the valves?
            You can get rid of that popping with a mixture adjustment.

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            • #9
              The tps regulates the ignition timing, without it your timing reverts to wot.............
              not all those who wander are lost......

              Comment


              • #10
                Nice work Duke.
                It's not that life is so short, it's just that you're dead for so long.---unknown.

                Comment


                • #11
                  Thank you MikeyC.
                  gary1717, the TPS controls the ignition timing curve throughout the RPMs.

                  Comment


                  • #12
                    Jaybo, It looks like he did a really nice job rigging up your TPS!! How does one acquire one of these?

                    Comment


                    • Duke
                      Duke commented
                      Editing a comment
                      If interested, PM me. You would have to mail your carb to me to install and a-line time it to the throttle shaft.

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