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Basic YICS question

Discussion in 'XJ Technical Chat' started by peganit2, May 26, 2014.

  1. peganit2

    peganit2 Member

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    How can you tell by looking at an engine if it has YICS? I mean aside from the obvious "YICS" markings on the side plate. (My side plates sure don't look like they belonged to this engine model.)
     
    peganit2, May 26, 2014
    #1
  2. k-moe

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

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    YICS engines have a bolt at the rear of the head, below the head gasket. You can also see the YICS passages cast into the back of the head.

    [​IMG]
     
    k-moe, May 26, 2014
    #2
  3. peganit2

    peganit2 Member

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    That's EXACTLY what I needed.

    Thanks again K-moe.
     
    peganit2, May 26, 2014
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  4. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Except the bolt you have labeled "oil pressure plug" isn't.

    I'm pretty sure that's the retainer bolt for the bottom cam chain guide mount.

    "YICS" is also cast into the valve cover. If the valve cover just says "Yamaha" it's not a YICS motor. (The valve covers aren't interchangeable.)

    [​IMG]
     
    bigfitz52, May 26, 2014
    #4
  5. k-moe

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

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    That pic was borrowed from the XS11 forum, and is of an XJ1100. The XS11 uses that hole for the oil pressure sending unit. That plug (and the oil pipe next to it) does not exist on the XJ650/750.

    http://www.xs11.com/forum/showthread.php?t=36652
     
    k-moe, May 26, 2014
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  6. Bargomer

    Bargomer Member

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    That's one sexy valve cover!
     
    Bargomer, May 26, 2014
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  7. Polock

    Polock Well-Known Member

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    that softsoap is good stuff
     
    Polock, May 26, 2014
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  8. ColoradoDan

    ColoradoDan Active Member

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    priceless :lol:

    I get those sponges at costco, 18 pack for like 8 bucks
     
    ColoradoDan, May 27, 2014
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  9. peganit2

    peganit2 Member

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    That is real perty cam cover for sure!! Hope my NON YICS :( cover turns out as well.

    For some reason it had a "YICS" engine side cover on it. :? I suspect crash repair.

    The YICS cover didn't fit quite right BTW.
     
    peganit2, May 28, 2014
    #9
  10. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    bigfitz52, May 28, 2014
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