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Head differences xj1100/xs1100

Discussion in 'XJ Technical Chat' started by Turbobob23, Mar 3, 2021.

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  1. Turbobob23

    Turbobob23 Member

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    Doing a rebuild of my 82 XJ 1100.
    So upon clean up of the xj1100 head, I see damage on the cam journals. I have access to an xs1100 head but not sure if it will work. would like to know if this is even possible , are they interchangeable between 81 xs and 82 xj ??
     
    Turbobob23, Mar 3, 2021
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  2. FJ111200

    FJ111200 Active Member

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    They are interchangeable but you won't have the YICS with the XS head. You might also need to use the XS cams.
     
    FJ111200, Mar 3, 2021
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  3. Turbobob23

    Turbobob23 Member

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    Thanks. I'll check what YICS does for the XJ to see the benefits
     
    Turbobob23, Mar 3, 2021
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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    the yics head has a port from 1 side to the other and little holes that go up to the intake side to swirll the fuel into the cylinder to help with full/cleaner combustion.
    it was done to meet epa requirments.

    same intake boots on xs and xj 1100


    the 650 had non yics and yics motors 80.
    some say non is a quicker faster bike some say yics is the quicker faster 650
     
    XJ550H, Mar 3, 2021
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  5. Turbobob23

    Turbobob23 Member

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    Thanks guys. I feel confident in taking the non YICS head for the fix after reading all about it and some of the differences. As I start my reassembly with the BB piston kit thats coming I will be posting pics and updates.
     
    Turbobob23, Mar 3, 2021
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