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Another shim thread (extremely tight)

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    Another shim thread (extremely tight)

    All of my shims are too tight, I was assuming that since the guy before me probably never had them checked. I had a 2.85 shim in one of the intake spots. I swapped it with a 2.80, and then a 2.75 and still don't have any clearance with a .0015 feeler (i know it can go down to .0012). I tried a trick I read on here that if you can spin the shim with your finger with the lobe in the correct position, then you should only need one step down in a shim, but this isn't the case with mine. Does this still seem normal? Should I go ahead and order 3 steps down for each? Id rather not have to order a ton of extra shims if I don't have to. I guess I could order one 2.70 to replace the 2.85, and try the 2.70 on all the others for a baseline.

    For anyone that is interested here is what I had (all were too tight, but all spun under the lobe.)

    1979 gs1000L
    ex1: 2.80
    ex2: 2.80
    ex3: 2.80
    ex4: 2.85

    in1: 2.85
    in2: 2.80
    in3: 2.80
    in4: 2.75

    #2
    Assuming that you are checking clearance with lobs in right spot, Those are thick shims. What mileage is on this critter?
    do you have a micrometer or vernier caliper to check the marked numbers?
    personally, i would get shims to aim for maximum clearance or a little above. Do you know about the shim club? Member "ghostgs1"
    member Steve has a handy dandy spreadsheet to keep track of shims you got.
    1981 gs650L

    "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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      #3
      Originally posted by tom203 View Post
      Assuming that you are checking clearance with lobs in right spot, Those are thick shims. What mileage is on this critter?
      do you have a micrometer or vernier caliper to check the marked numbers?
      personally, i would get shims to aim for maximum clearance or a little above. Do you know about the shim club? Member "ghostgs1"
      member Steve has a handy dandy spreadsheet to keep track of shims you got.
      I do not have a way to measure the shims but they each had the number still on it. I believe the bike is somewhere in the 20k mile range. I found the shim club after i posted this and asked if I could get a 2.70, 2.65 and 2.60 and see what happens with those. thanks for your input

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