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  • #1

    shims?

    OK.....trying to get this 79 running. In an atempt to get it running better I pulled the valve cover and checked clearances. I have 4 valves that need adjustment.

    The first one I went to adjust was #4 intake and it was at .076mm so I need to open it up. -.120mm would put at loose spec.-.100mm at tight. The shim that's in there is a .255 so I need a .135-.155 shim. Yeah right, the thinnest I have is a .225. Nowhere near what I need.

    WTF? Grind some off the top of the valve stem?

    I don't think there are shims that thin are there?
    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.
    Tags: None
  • #2
    hey greg,
    whats all that in imperial?

    each shim is equal to a whisker under 2 thou,

    makes it easier in trying to convert
    rather than using metric.
    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

    • #3
      Specs for the 79 are .006 to .008 in. the .225mm shim puts me at a tight .004 in. Just in specs for an 80-81 which is .004 to .006.
      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

      • #4
        The shim guide in the FSM shows shims down to 200. I am sure they are available but may be hard to come by. Maybe Yammrobber will be your only choice.
        2-79 XS1100 SF
        2-78 XS1100 E Best bike Ever
        80 XS 1100 SG Big bore kit but not fully running yet.
        Couple of more parts bikes of which 2 more will live!

        Comment

        • #5
          Originally posted by BA80 View Post
          Specs for the 79 are .006 to .008 in. the .225mm shim puts me at a tight .004 in. Just in specs for an 80-81 which is .004 to .006.
          ive been running my sports with 4thou clearances,
          my engine is basically the same as the 78/79 2h7 engine,
          u could try grinding the shim down, not as easy as it sounds
          but can be done, place the grounded down side into the bucket.
          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

          • #6
            @ Rasputin....It would probably be cheaper to change the head.

            @ petejw.... I'm gonna go ahead and check the other 3 and see where they are. I don't think a little surgical grinding is completely out of the question.
            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

            • #7
              Greg, the shims start at 200 and go on up....

              http://www.newmotorcycleparts.com/mo...lve_shims.html
              2H7 (79) owned since '89
              3H3 owned since '06

              "If it ain't broke, modify it"

              ☮

              Comment

              • #8
                Someone check my math please.

                I have a 2.225 shim in now, my clearance is approximatly .100mm (.004 in.).

                Specs being 0.16 to 0.20mm (.006 to.008in).


                What do I need here?
                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

                • #9
                  225 shim clearance is at .004
                  220 shim clearance would be .006
                  215 shim clearance would be .008
                  2H7 (79) owned since '89
                  3H3 owned since '06

                  "If it ain't broke, modify it"

                  ☮

                  Comment

                  • #10
                    .002in shows to be .050800mm on the conversion chart.What am I missing?
                    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

                    • #11
                      It's not exactly .002"; each shim size change is .00198" more or less, so you'll get a little 'size creep'.
                      Fast, Cheap, Reliable... Pick any two

                      '78E original owner - resto project
                      '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
                      '82 XJ rebuild project
                      '80SG restified, red SOLD
                      '79F parts...
                      '81H more parts...

                      Other current bikes:
                      '93 XL1200 Anniversary Sportster 85RWHP
                      '86 XL883/1200 Chopper
                      '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
                      Cage: '13 Mustang GT/CS with a few 'custom' touches
                      Yep, can't leave nuthin' alone...

                      Comment

                      • #12
                        Originally posted by BA80 View Post
                        @ Rasputin....It would probably be cheaper to change the head.

                        @ petejw.... I'm gonna go ahead and check the other 3 and see where they are. I don't think a little surgical grinding is completely out of the question.
                        Greg. When I last ordered some shims (about a yr ago) they came in at $7.45 Canuck bucks per shim. Thinking a head may be a tad bit more than that.
                        2-79 XS1100 SF
                        2-78 XS1100 E Best bike Ever
                        80 XS 1100 SG Big bore kit but not fully running yet.
                        Couple of more parts bikes of which 2 more will live!

                        Comment

                        • #13
                          OK........I screwed up again. First of all my math sucked I should have used the chart to begin with.

                          first, I put a .250 in place of the original .255 and it fell right into specs.

                          Second, this is the shim I was thinking was a .225.........



                          What the hell is that number anyway?
                          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

                          • #14
                            That's got to be a misprint.....
                            Fast, Cheap, Reliable... Pick any two

                            '78E original owner - resto project
                            '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
                            '82 XJ rebuild project
                            '80SG restified, red SOLD
                            '79F parts...
                            '81H more parts...

                            Other current bikes:
                            '93 XL1200 Anniversary Sportster 85RWHP
                            '86 XL883/1200 Chopper
                            '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
                            Cage: '13 Mustang GT/CS with a few 'custom' touches
                            Yep, can't leave nuthin' alone...

                            Comment

                            • #15
                              I'll measure it tomorrow and see exactly what it is.
                              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

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