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    Valve Shims - what sizes?

    Alrighty, So I cracked open my valve cover and did my first partial valve job today. Below is a list of current valve clearances and then current shim sizes. I've read through a couple other threads and am pretty sure the below "need" shims are the correct ones I should put in. But I just want to get a second opinion before I dive into it.

    If I am not mistaken, (Intake #3 for example) should go from a 2,50 shim down to a 2,45. Although this puts my valve clearance at 8.8. It would be more ideal than the .038 that I am currently at right?

    Also was wanting to know if I can just order the exact ones I need or if I have to buy a whole kit. (all I could find were kits)

    Thanks in advance everyone!
    ~Nate

    INTAKE

    #1 - Smallest feeler wont fit! - 2,50 - need 2,45
    #2 - Smallest feeler wont fit! - 2,65 - need 2,60
    #3 - .038 - 2,5? (3rd # worn off) need 2,45 MAYBE 2,50 if the current is a 2,55
    #4 - Smallest feeler wont fit! - 2,55 - need 2,50

    EXHAUST

    #1 - .051 - 2,70 - GOOD!
    #2 - Smallest feeler wont fit! - 2,75 - need 2,70
    #3 - .038 - 2,80 - need 2,75
    #4 - .038 - 2,75 - need 2,70

    #2
    You may need to move those "smallest feeler won't fit" valves TWO shim steps. I'd plan that way anyway. Z1 Enterprises sells shims for a fair price.
    Ed

    To measure is to know.

    Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

    Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

    Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

    KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

    Comment


      #3
      two shim sizes would equal .10 difference in valve clearance. according to my Clymer, my acceptable valve clearance should be between .03-.08

      So correct me if I'm wrong, but wouldn't that addition equal more than my acceptable valve clearance? or is being a little positive not that terrible of a thing?

      Comment


        #4
        How do you know the clearance if you can't get a feeler in there? There may be zero clearance or even less.
        Ed

        To measure is to know.

        Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

        Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

        Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

        KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

        Comment


          #5
          Email Steve for his valve spreadsheet
          Cowboy Up or Quit. - Run Free Lou and Rest in Peace

          1981 GS550T - My First
          1981 GS550L - My Eldest Daughter's - Now Sold
          2007 GSF1250SA Bandit - My touring bike

          Sit tall in the saddle Hold your head up high
          Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
          and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"

          Comment


            #6
            You could join the shim club, get two sizes smaller for the ones too tight and one should fit. Super quick delivery and all you have to do is send Ray a donation and send back the un used shims. Good Luck.

            Comment


              #7
              Here's my trick to see how tight it really is when the smallest feeler (usually .036mm) won't go in.

              Put the cam in the position to check two valves, then try to spin the shim in the bucket of those two valves with your finger. If it spins easily, there is at least some clearance, one size smaller should get you betwen .05mm and .09mm. If it won't spin easily, you really have to force it to turn the shim, there is zero or less clearance. Going down two sizes should put you somewhere under .10mm.

              There may be one or two valves soo tight that two sizes smaller isn't enough, so always recheck the clearances after you have all the shims in place that you think are correct, turn the engine over a few times to squeeze all of the oil out from thinder the shim, etc..
              http://img.photobucket.com/albums/v5...tatesMap-1.jpg

              Life is too short to ride an L.

              Comment


                #8
                Shim club eh!? that sounds like music to my motor! I would be more than happy to send the shims in that I cant use. Some of these I can re-purpose on other valves but I will still need some replacements.

                Looking at needing

                2X - 2,65
                2X - 2,40
                1X - 2,45

                Do you happen to have Ray's actual user name?

                Originally posted by Morrison View Post
                You could join the shim club, get two sizes smaller for the ones too tight and one should fit. Super quick delivery and all you have to do is send Ray a donation and send back the un used shims. Good Luck.

                Comment


                  #9
                  Ghostgs1 .
                  http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                  Life is too short to ride an L.

                  Comment


                    #10
                    Originally posted by cowboyup3371 View Post
                    Email Steve for his valve spreadsheet
                    Click on my username for e-mail information.

                    As a stop-gap measure, remove the 2.50 from EX1, put a quarter in its place. (You are moving that one because it's your smallest one.) Move the 2.50 into places where you could not measure any clearance. You may end up with some extra clearance, but at least you will be able to measure it and calculate what you need. Then, it will just be a matter of ordering one 2.45 and maybe a 2.40 to fill the need for EX1 to replace that 2.50.

                    .
                    sigpic
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                    Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
                    (Click on my username in the upper-left corner for e-mail info.)

                    Comment


                      #11
                      I have heard some people use coins just so they can rotate the valves in order to get all the shims out. will a quarter work? or is this a bad idea altogether?

                      Comment


                        #12
                        Nevermind, I'm an idiot...

                        Originally posted by Steve View Post
                        Click on my username for e-mail information.

                        As a stop-gap measure, remove the 2.50 from EX1, put a quarter in its place. (You are moving that one because it's your smallest one.) Move the 2.50 into places where you could not measure any clearance. You may end up with some extra clearance, but at least you will be able to measure it and calculate what you need. Then, it will just be a matter of ordering one 2.45 and maybe a 2.40 to fill the need for EX1 to replace that 2.50.

                        .

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