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valve shim question

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  • valve shim question

    So, I getting ready to do the first service after my rebuild, I have at least I valve that's making a lot of noise, obviously gonna need a taller shim. Tallest I have is in, 295 IIRC, local Yamaha shop says 'no longer available'

    I remember seeing it posted here that the same shims are used in automotive application's, but can't recall which, can anyone help?

    I will post what size I need as soon as I figure out which....
    1980 XS11 Special aka The Monster
    "My life used to be a Soap Opera, until I realized something, I own the network."
    My Photo Bucket

  • #2
    Go to a shop that REALLY has interest in what they do and what they know..........obvious where you went could care less and are clueless anyways. You'd think with the poor economy these places would pull there head out....duh. Kaw. and a few others use the same 29mm shims.......very common and most shops have a few buckets of different MM shims for the different applications. Those that don't aren't real working shops anyways.......just gettin' by type. Remember, there are dealers and stealers..... their shop, abilities and work ethics can tell you alot about their work........remember, feast your eyes whenever possible to the shop area.......that will be a good indication of there credibility.
    81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

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    • #3
      The late 70's Kawasaki KZ's use 29mm shims as do the BMW's and the Ford Taurus.

      Let me know what size shim you need, if I have it, I'll mail it to you.
      Former owner, but I have NO PARTS LEFT!

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      • #4
        It is the ford SHO engines that used the same shims, but they are hard to find as well, and expensive. Motoman is right in all that he says, find the shop that knows what they are talking about. It is the same in the automotive parts houses, if the computer says it isn't available, then they can't get it, but anyone that knows anything will usually know that other vehicles use the same thing. Was in the buisiness for 25 years, and have seen a lot of parts guys that almost know what a spark plug is.
        1980 XS1100LG Midnight
        1991 Honda CBR1000F Hurricane


        "The hand is almost valueless at one end of the arm if there be not a brain at the other"

        Here's to a long life and a happy one.
        A quick death and an easy one.
        A pretty girl and an honest one.
        A cold beer and another one!

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        • #5
          If your running a 295 shim and it is loose, not tight, but loose, then I would say you have a stuck valve or something. That is a very thick shim for these engines. I would be very surprised if you need a thicker shim, or if they make one.
          Life is what happens while your planning everything else!

          When your work speaks for itself, don't interrupt.

          81 XS1100 Special - Humpty Dumpty
          80 XS1100 Special - Project Resurrection


          Previously owned
          93 GSX600F
          80 XS1100 Special - Ruby
          81 XS1100 Special
          81 CB750 C
          80 CB750 C
          78 XS750

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          • #6
            Your shims will go down in size over time, not up.
            Nathan
            KD9ARL

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            1978 XS1100E
            K&N Filter
            #45 pilot Jet, #137.5 Main Jet
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            LED Dash lights
            Ammeter, Oil Pressure, Oil Temp, and Volt Meters

            Green Monster Coils
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            Vision 550 Auto Tensioner

            In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

            Theodore Roosevelt

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            • #7
              29MM valve shims, sizes up to 310...

              http://www.crc2onlinecatalog.com/valve_shims.htm
              2H7 (79) owned since '89
              3H3 owned since '06

              "If it ain't broke, modify it"

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              • #8
                More info on this issue

                Forgot to mention that when I did the rebuild, I also had new SS valves put in, which obviously means a valve job....
                I noticed the NOISY valve since the first time I started the motor,
                yes I know the valve train on theses motors is a bit noisy, but THIS is excessive....
                I havent pulled the valve cover yet, but cant imagine finding one that is too tight making this much noise, never know.....

                thanks for all the input guys, as always, you are a huge help!
                1980 XS11 Special aka The Monster
                "My life used to be a Soap Opera, until I realized something, I own the network."
                My Photo Bucket

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                • #9
                  When I redid the valves on Succubus, one of my Fs, I needed a 315 to get the valve gap right. A local shop that handles several brands of motorcycles traded me even up for a 275 I had. So they do come thicker, and shops that want business often do not you charge if you have an exchange.

                  The shop I traded with, BTW, is known locally for not being the most responsive place in town, so if they would make the swap I would think almost any decent dealers would.

                  Patrick
                  The glorious rays of the rising sun exist only to create shadows in which doom may hide.

                  XS11F (Incubus, daily rider)
                  1969 Yamaha DT1B
                  Five other bikes whose names do not begin with "Y"

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