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  • #1

    Valves disks

    Hello everyone shade tree bike guy here again picking your brains. I have my carbs being rebuild and decided it was time to measure valves.

    Exhaust was .24 .24 .25 .20
    Intake was 0 .14 0 0 (the 0s come from my .04 would not go in

    My shims for
    Exhaust #4 (.20) is y285 (that's the only exhaust one I am changing)
    Intake y270 y255 y275 #4 I could see anything so going to measure later.

    anyone one know what shims I need to get
    Bike History:1980 XS 1100 special current bike
    1980 XS 850 special wife sold
    Tags: None
  • #2
    Did you measure them with the lobe COMPLETELY opposite the contact point on the shim?

    http://hitechkc.dyndns.org:78/phpbb3....php?f=5&t=106
    Greg

    Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

    ― Albert Einstein

    80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

    The list changes.

    Comment

    • #3
      yes

      I truly think so
      Bike History:1980 XS 1100 special current bike
      1980 XS 850 special wife sold

      Comment

      • #4
        and..........

        Do we think these funkie valve numbers could have something to do with my gas out the airbox
        Bike History:1980 XS 1100 special current bike
        1980 XS 850 special wife sold

        Comment

        • #5
          Did you click the link to the shim charts?

          Each shim size is approximately .002".
          Greg

          Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

          ― Albert Einstein

          80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

          The list changes.

          Comment

          • #6
            Humm .. have you ever considered getting a service manual ? Most of this stuff is clearly spelled out there. No offense intended. Maybe someone would ask Ringer who seldom visits if His pdf manual could be hosted here. Justsaying. Hat off to Him.
            79SF
            XJ11
            78E

            Comment

            • #7
              Well like I said

              I have little or no skills working on this bike so I really rely on all you guys. I just figured if I put in my readings some one would just look at them and know off the top of there heads.
              Bike History:1980 XS 1100 special current bike
              1980 XS 850 special wife sold

              Comment

              • #8
                Ok is this how you do it?

                Ok does it work this way?

                intake 1 I have 270 my .04 wouldn't go in so say it was .02 I need .16-.20 so does that mean I need a 270 - 16 =254 sim? (16 comes from .02 and wanting .18 so 16)
                Bike History:1980 XS 1100 special current bike
                1980 XS 850 special wife sold

                Comment

                • #9
                  There is an Intake/Exhaust chart that takes away all the guessing. Do a search for it.
                  1979 XS1100F
                  2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

                  Comment

                  • #10
                    Originally posted by Jeffintampa View Post
                    Ok does it work this way?

                    intake 1 I have 270 my .04 wouldn't go in so say it was .02 I need .16-.20 so does that mean I need a 270 - 16 =254 sim? (16 comes from .02 and wanting .18 so 16)
                    Yep you got it, take a look at the link in post #2 up above, from BA80, and it has the chart to confirm your findings

                    GL
                    1980 XS1100G "Dolly G" Full Dresser (with a coat of many colors )
                    1979 XS1100SF (stock-euro mods planned)
                    1984 XV700L Virago (to be hot-modded)
                    1983 XJ750MK Midnight Maxim (semi-restored DD)
                    1977 XS650D ( patiently awaiting resto)

                    Sometimes it takes a whole tank of gas before you can think straight.

                    Comment

                    • #11
                      Ok

                      Ok talked to the guy who is helping me, about the .0 rounding to .02 He suggested using 0 and really shooting for all the intakes to be at the .20 or high side of the 16-20 would that be best? shoot for 20 on every intake?
                      Bike History:1980 XS 1100 special current bike
                      1980 XS 850 special wife sold

                      Comment

                      • #12
                        need

                        I need 2 250s and one 245
                        Bike History:1980 XS 1100 special current bike
                        1980 XS 850 special wife sold

                        Comment

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