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Float height '81

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  • #16
    goldcoast/petjw, do you both have the adjustable needles? If so, what is the mikuni number on them? I might want to get some of those.
    '81 XS1100 SH

    Melted to the ground during The Valley Fire

    Sep. 12th 2015

    RIP

    Comment


    • #17
      Hey GC and PeteW,

      From your descriptions, you do have the later model carbs, but with adjustable slide needles. Like GC said, probably allowed do to less emissions standards there than in USA?! But I don't have any specific info on the differences?

      Pete, have you tried taking OFF the pods and running it just to see how it responds? Some pod filters have prominent lips on the mounts that can interfere with the air flow! If it behaves the same with the pods off, then you know it's carb tuning, and not any obstruction from the pods! Just one more thing to rule out.
      Also, what kind of PODS, do you put oil on them, or dry? Too Much Oil??

      Also, where did you get your PILOT JETS? Some have been known to be the wrong sizes, not enough vent holes, opening too big despite what is written on the jet, K&L brand, and can lead to a very rich condition in the lower rpm ranges, poor off the line response.
      T.C.
      T. C. Gresham
      81SH "Godzilla" . . .1179cc super-rat.
      79SF "The Teacher" . . .basket case!
      History shows again and again,
      How nature points out the folly of men!

      Comment


      • #18
        TC and 81XS, carbs are mikuni CV and have 5k7-00 stamped on them with the number 222 under it, the bike is a 7/82XS1100R, yes we both have adjustable needles...and both had 110mains etc same as what pete wrote before...feed back would be good if these numbers mean anything (especially the 222 number under the first one)...Cheers
        1982 XS1100R
        1982 XJ650
        1983 VT400
        1990 XVS Shadow
        1983 Z1100

        -I just love the look on their faces when you leave them standing in the dust after they've lined you up on your XS.

        Comment


        • #19
          I don't know anything about those numbers, but if you open them up, please don't forget to take a look at the mikuni number stamped in the needles. This would be an awesome addition for those of us with '80's carbs that have to shim our needles with washers.
          '81 XS1100 SH

          Melted to the ground during The Valley Fire

          Sep. 12th 2015

          RIP

          Comment


          • #20
            sorry i havent got back sooner,
            hope u all had a great easter!

            the pod filters are uni, wash them in 2 stroke
            and put back in dry,
            the pilot jets are from mikes xs,
            i havent had a chance this weekend, but im going to
            lean the fuel mixture out and reset floats to 26mm,
            my fuel economy is shot at the moment am only getting
            140k b4 the fuel lite lites, prior i was getting over 170ks,
            if leaing mixture doesnt fix anything, ill put the
            oringinal jets back in and play from there.

            i checked out the spare set of carbs i have with adj
            needles there are no numbers stamped on them
            pete


            new owner of
            08 gen2 hayabusa


            former owner
            1981 xs1100 RH (aus) (5N5)
            zrx carbs
            18mm float height
            145 main jets
            38 pilots
            slide needle shimmed .5mm washer
            fitted with v/stax and uni pod filters

            [url]http://www.youtube.com/watch?v=3pA8dwxmAVA&feature=mfu_in_order&list=UL[/url]

            Comment


            • #21
              those needles may not be stock. Every mikuni needle I have seen has numbers and the mikuni (square inside a square) symbol stamped in it.
              '81 XS1100 SH

              Melted to the ground during The Valley Fire

              Sep. 12th 2015

              RIP

              Comment

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