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Thread: spark plugs?

  1. #1

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    spark plugs?

    what spark plugs are you running, what heat range, what gap size?


  2. #2
    Moderator RX951's Avatar
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    welcome to the forum


    • what personal watercraft are you referring to?
    • stock or modified?

  3. #3

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    stock 2007 gp1300r im planing on indexing them but i want to know if there is a better heat range then what stock is and gap size?

  4. #4
    BoostCrzy's Avatar
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    Stock plugs are the best...NGK BR8ES-11 ... .040 gap...I like to use a BR8ES (not-11) @ .035 if im doing a J-Gap...

  5. #5
    JKR1300's Avatar
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    Index the OEM plugs - BR8ES-11

  6. #6
    Happily Self-Employed WFO's Avatar
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    I use the BR8s up to 150psi compression and the BR9s (colder) when over 150psi

  7. #7
    YamahaToys's Avatar
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    Quote Originally Posted by WFO View Post
    I use the BR8s up to 150psi compression and the BR9s (colder) when over 150psi

    WFO suggested I start using BR9s after I my 2007 was ported.

  8. #8
    Moderator OsideBill's Avatar
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    I use the BR8EIX Irridium no j-gapping needed on these, then index them. remember to index with the ground pointing at the exhaust.

  9. #9

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    thats the open end on the gap towards?

  10. #10
    WATER WOODY's Avatar
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    Open end towards exhaust port.

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