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REAR PLUG dry black, front OK

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  • REAR PLUG dry black, front OK

    REAR PLUG dry black, front OK, looks like gas foul, 04 stage 1 , carb with barons, and jetted per RSC instrux.
    i checked for intake leaks,
    how do we do compr ck?

  • #2
    remind us on your jetting? is your bike running OK? or is it running on just the front cylinder?

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    • #3
      Sounds like SVS (sticky valve syndrome) to me

      Comment


      • #4
        Sounds like a slight intake leak to me.

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        • #5
          ok, 05, 1700 stage 1 exhaust (4 1/2 " holes and cones removed.); main 172.5 , 40 pms, 4th clip of five baron's kit, from blunt end, real mikuni jets, i took it apart today, after reading in jetting here at RSC , supposed to be plastic doughnut only under the clip, so i removed thin washer. this bike got poor mileage, except, and started too easy without choke.
          does the speedo assembly effect ign electronics, or just turn signals? i leave it off while testing.
          is that correct, no washer, only plastic doughnut under clip?

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          • #6
            with stage 1 exhaust try 3rd groove with 2 washers under the clip. the washer missing on top the clip won't matter so use that one as your 2nd under the clip. Also make sure the pms screw is between 2- 1/4 - 2- 1/2 turns out. this will lean it out just a little bit. then we will proceed from there if needed.

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            • #7
              first im gonna see how it goes after removing the one washer below? proceed from there. ? tks

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              • #8
                FYI The rear does run hotter, less air blow by and heat from front cylinder, so it's not uncommon for the plugs to look different than the front cylinder. But it does sound like you're running rich if you don't need the enricher knob to start. Give it a try with only one washer, but I have a feeling DaveJ is right. Also, there should be a washer under the plastic spacer. If you have no washer at all, I'd move the clip up one groove toward the blunt end.

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                • #9
                  After thinking about that I think that will put you in the same place. equal to groove 3.5

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                  • #10
                    I think the issue is the jetting you have used is for use with aftermarket exhaust and air filter (K/N style). Stage 1 is still pretty restrictive in comparison.We will have to do a little trial and error to get you where you need to be with the stage 1 exhaust.It may even take going down to a 37.5 pilot even though it is a 1700. You also didn't say what airbox you are using? Stock box and filter? stock box w/K/N filter? Stock box drilled to a poormans BAK or a Aftermarket style filter?

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                    • #11
                      I think you're right about the pilot jet. I'm running a 37.5 on my 1700, and that's with true duals and a Hypercharger Pro. I tried the 40 but it was too rich. As it is now, I can't even pull my enricher all the way out on a cold start up, otherwise the motor starts stumbling from being too rich.

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                      • #12
                        When pulling the enricher out all the way to start the bike when cold it will stumble after a few seconds and then push it in to about 1/2 way is normal.

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                        • #13
                          all 3 my RS have KN 2 in thick, 2 are oval 1 round. all universal clamp on. regularly cleaned and re-oiled with red KN spray. not too much oil either where it cant breathe.

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                          • #14
                            Try the jetting configuration above to see where that puts you. I don't know if you have had a chance to ride after removing the washer but if that don't do it also change to the smaller pilot jet.

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