1. Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

XJ650 spark plug gap

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

  1. ouchie

    ouchie Member

    Messages:
    91
    Likes Received:
    0
    Trophy Points:
    6
    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
    #1
  2. moellear

    moellear Member

    Messages:
    858
    Likes Received:
    4
    Trophy Points:
    18
    Location:
    Lima, Ohio
    IIRC, its around .75mm (.7 ~ .8)
     
    moellear, Sep 19, 2011
    #2
  3. Mr.Etobicoke

    Mr.Etobicoke Member

    Messages:
    75
    Likes Received:
    0
    Trophy Points:
    6
    Location:
    Toronto, Canada
    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
    #3
  4. ouchie

    ouchie Member

    Messages:
    91
    Likes Received:
    0
    Trophy Points:
    6
    'preciate the help gents!
     
    ouchie, Sep 19, 2011
    #4
  5. bigfitz52

    bigfitz52 Well-Known Member Premium Member

    Messages:
    21,283
    Likes Received:
    416
    Trophy Points:
    83
    Location:
    Rural SE Michigan 60 miles N of Motown
    They only widen with the miles; I generally start at .025"
     
    bigfitz52, Sep 19, 2011
    #5
  6. xj_mark

    xj_mark New Member

    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Chicagoland Illinoise
    Fitz,

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

    XJ550? NGK DR8ESL

    Thanks.
     
    xj_mark, Sep 24, 2011
    #6
  7. bigfitz52

    bigfitz52 Well-Known Member Premium Member

    Messages:
    21,283
    Likes Received:
    416
    Trophy Points:
    83
    Location:
    Rural SE Michigan 60 miles N of Motown
    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
    #7

Share This Page