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shim help please

Discussion in 'XJ Technical Chat' started by cgutz, Apr 23, 2016.

  1. cgutz

    cgutz Well-Known Member

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    Ok friends. Here are my numbers. What shims do I need? Thanks in advance.

    All numbers in millimeters

    intake
    1 .12 255
    2 .02 260
    3 .11 260
    4 .10 260

    exhaust
    1 .11 270
    2 .11 265
    3 .12 260
    4 .12 265


    wonder why #2 intake so much tighter than others. Double checked it.
     
  2. caliXJ_Bobber

    caliXJ_Bobber Member

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    Bike?
     
  3. cgutz

    cgutz Well-Known Member

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    sorry 1983 xj550k maxim
     
  4. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Dosen't matter much. Only the Maxim X has different clearances.
     
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  5. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    intake
    1 .12 255 in spec
    2 .02 260 needs a 250
    3 .11 260 in spec
    4 .10 260 needs a 255

    exhaust
    1 .11 270 needs a 265
    2 .11 265 needs a 260
    3 .12 260 needs a 255
    4 .12 265 needs a 260

    Use #2 intake in #2 exhaust
    Use #4 intake in #4 exhaust
    Use #2 exhaust in #1 exhaust

    The one tight intake is probably down to a PO not figuring shim swaps correctly, but I'd keep an eye on it and check clearances in 2,500 miles instead of waiting another 5,000. The #1 and #3 intakes might need new shims early anyway.
     
  6. cgutz

    cgutz Well-Known Member

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    thanks kmoe. original owner so Yamaha dealer calculated wrong since I know for certain when and who did the last adjustment :-(.
    This is my first time doing it thanks to this site. It has been 12000 miles since last done.

    glad I checked here, I was reading the substitution chart bassackwards and it didn't make sense. now I know why!
     
    Last edited: Apr 23, 2016
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  7. cgutz

    cgutz Well-Known Member

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    Kmoe - If I'm figuring right I only need to order

    250 - 1
    255- 2
     

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