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PMS closing all the way doesnt do anything

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  • #21
    THATS FUNNY, I WAS IN THat thread thickback then too, so , so we do set the float level with the bike level, right? not the carb level?

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    • #22
      You can set the float on a bench, but when you measure fuel level on the bike with a clear hose, you want the bike level. I guess since you'll have the carb out to change the pilot, might as well check the float level too.

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      • #23
        I do have the car up out of the manifold but I still have the fuel line the choke the heater wire hooked up you don't have to remove the the carburetor I can set the float level change the Jets any of that just by pulling the air cleaner but to pull the top off the carburetor and access the needle valve I have to to remove fuel tank.
        I guess my big question here is with K & N small round filter ,stage 1 exhaust, Barons needle do I leave it on the 4th clip? I can change the idle Jet anytime but before I put the tank back on should I leave it on the 4th clip

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        • #24
          leave it on the 4th groove

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          • #25
            Okay on the needle , in order from the sharpest point which is the bottom to the top: metal washer , plastic donut washer, C clip, metal washer, little spring, plastic o-ringed retainer. Correct?

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            • SuperG
              SuperG commented
              Editing a comment
              Fourth groove from the blunt end.

            • Duke
              Duke commented
              Editing a comment
              Yes, that's correct.

            • Doc_V
              Doc_V commented
              Editing a comment
              What Duke said...

          • #26
            Could it be I need the 170 main with stage 1 oem exhaust?

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            • #27
              Possibly... BTW any chance you have Dynojet jets? Cuz they are bigger than regular Mikuni jets... Just to be sure we're talking apples to apples and oranges to oranges... Then Mikuni Logo is a square with a square...

              Click image for larger versionName:	Mikuni-Main-Jet-Large-Round-N100.604.jpgViews:	1Size:	175.1 KBID:	33344

              Her's the conversion chart...

              Click image for larger version  Name:	file.php?id=158&sid=c305d036eaaa996148a0cfc6a16b8502.png Views:	1 Size:	4.7 KB ID:	33343

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              • #28
                tks, but they are mikuni, nice chart tho , should add that to the jetting tech page!

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                • #29
                  Okay I put it back together with a stock 170 main jet, 35 pilot , recheck the float level 3 mm above seam L rear of carb .
                  Gas on, key on , starts up with a little twist of throttle to get Accel pump squirt. But it starts cold with choke off . No air filter.

                  Put air filter on.
                  But now it responds to adjustments on the PMS. Seems to run ok will have to do my motorcycle enthusiASSt testing next.

                  I did not get a chance to drive it as it was pouring and I had to go to work.
                  The main jet screws into a piece of metal that is mounted in the aluminum housing of the carburetor. Is that Pressed in and is it supposed to be able to move up and down easily after the main jet is removed?

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                  • texasscott1
                    texasscott1 commented
                    Editing a comment
                    You're a little low on the float level. The spec is 4-5 mm's above the bowl seam.

                  • Duke
                    Duke commented
                    Editing a comment
                    I run 2 to 3mm max above the seam line and have found that there is more than enough fuel for any of my throttle operations. When I was at 4mm, every now and then I would get carb puke after a hot day and shutting down.

                • #30
                  Originally posted by brianmac View Post
                  The main jet screws into a piece of metal that is mounted in the aluminum housing of the carburetor. Is that Pressed in and is it supposed to be able to move up and down easily after the main jet is removed?
                  Yep... Can be a PITA sometimes to get the main in because that piece wants to slide. I found it helps to hold it up from the back side.

                  Glad to hear it's working better. Hopefully it will ride well.

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                  • #31
                    sorry guys, i got sidetracked with a 1983 xs650 heritage special ill get back

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                    • #32
                      it broke up at high rpms . ok, i changed it all back, 1700, 40 pilot, 172.5 mikuni, i moved the float level up a tad. it broke up at high rpms, so i took out a washer from below clip to lower the needle. now it runs the way it did , i i am going to try to move the main jet needle slide down 1 washer (leaner) ,ill have to go up to 3rd clip to do it. im thinkin it gets too much fuel from main jet at idle. remember im at or below sea level, and 70-98 % humidity, so what works in milwaukee.........

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                      • #33
                        It will break up at high RPM's it is called the REV limiter. The 172.5 main, 40 pilot and clip in the 4th groove 2 1/2 turns out on the PMS is a proven and perfect jetting for a 1700 regardless of where you live. It is a CV carb that don't really care about elevation.
                        .

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                        • #34
                          tks dave, at first i thought it was the rev lim, but then i lowered the needle back and its fine again, just one washer, is all it took. so im thinkin one more washer thickness lower!

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