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XJ650 spark plug gap

Discussion in 'XJ Technical Chat' started by ouchie, Sep 19, 2011.

  1. ouchie

    ouchie Member

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    Hey gang!

    Well did a search and looked in my Yamaha manual but oddly enough I can't seem to find the proper gap setting for the XJ650.

    Little help please? :D
     
    ouchie, Sep 19, 2011
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  2. moellear

    moellear Member

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    IIRC, its around .75mm (.7 ~ .8)
     
    moellear, Sep 19, 2011
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  3. Mr.Etobicoke

    Mr.Etobicoke Member

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    The plug is a NGK BP7ES and gapped at 0.7-0.8 mm or 0.023-0.032 inch.

    Kenneth
     
    Mr.Etobicoke, Sep 19, 2011
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  4. ouchie

    ouchie Member

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    'preciate the help gents!
     
    ouchie, Sep 19, 2011
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  5. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    They only widen with the miles; I generally start at .025"
     
    bigfitz52, Sep 19, 2011
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  6. xj_mark

    xj_mark New Member

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    Fitz,

    Is that the gap you set for all bikes or just the 650?

    XJ550? NGK DR8ESL

    Thanks.
     
    xj_mark, Sep 24, 2011
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  7. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    I use the same "starting" gap on the 550s, yes.

    And you should be running NGK D8EA in the 550, not DR8ESL's. Especially with the stock plug caps, you don't need resistor plugs too.
     
    bigfitz52, Sep 26, 2011
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