NGK Iridium Spark Plug Facts

Discussion in 'Engine and Performance mods' started by V8N3T, Aug 7, 2009.

  1. V8N3T

    V8N3T More mods plz.. Donating Member Registered

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    Hello all,

    I have been looking all over the board for an answer to my question. I did not want to post a question if I did not have to. After not being able to find what I was looking for, I finally contacted a NGK technical support representative. I figured there are more people wondering this same questions I had. So I figured I would post them up here for all of us to have clarification on.

    Below is the email I sent NGK with the response from the tech rep. I don't know if this should be pinned or not but I figured the validity of this response is stronger than hear-say.

    My Message:
    "VehicleType: Motorcycle
    Make: Suzuki
    Model: GSX1300R
    Year: 2007
    Engine Type: 1300CC DOHC 4cyl
    Comments: Hi,

    My question is about your product, NGK Iridium IX CR9EIX. I own a 2007 Suzuki
    Hayabusa (GSX1300R) which I will be replacing my OEM spark plugs with the
    CR9EIX. My question is in two parts.

    Question one is pertaining to applying anti-seize lube to the threads of the
    spark plug upon installation. Is this required with your product, or just a

    Question two is about gapping the spark plugs. Is this a requirement or a

    Please include as much information as you can to help better my understanding on
    this topic.





    With all NGK plugs its recommended to install the plugs dry, especially on the
    small 10mm diameter plugs like this one. Our plugs have a special Zinc metal
    plating on them that's designed to resist corrosion and prevent seizure to the
    cylinder head. Just be sure to tighten the plugs to 7.2-8.7lb-ft or use the
    angle method listed on the box and you'll be good to go.

    For this application the recommended gap is .028" and the CR9EIX is factory set
    to .032" so you may want to close the gap for the best performance and longest
    service life. When gapping an iridium plug be sure not to apply any pressure to
    the center electrode, only the ground electrode (j-piece) should be touched.
    Hope this helps, thank you.


    Brandon Peeler

    Technical Support Representative

    Aftermarket Division

    NGK Spark Plugs (U.S.A.), INC.

    46929 Magellan Dr.

    Wixom, MI 48393"

    So there you have it. I hope this provides clarification for those of us out there that had this same question in mind.


    Smooth_busa likes this.
  2. aussiekeeper

    aussiekeeper Registered

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    Ron Hildebrandt
    Do you have an application chart, Or does this # fit Gen2 also? I had them in my last bike for over 26,000 miles and they still looked new.
  3. Blazing-Saddle

    Blazing-Saddle "Kowalski" Donating Member Registered

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    Charlie Hayes
    I have a set of those plugs in my 07 and I still used a dab of anti-sieze on them but did not gap them. The plugs have been checked since the initial install and nothing has changed. It was recently dynoed and horsepower/torgue is about where it should be with the mods that have been done to the motor...
  4. V8N3T

    V8N3T More mods plz.. Donating Member Registered

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    I installed the new plugs last night and tested everything out today. The new plugs seemed to have provided a freshened feel to the bike. The throttle is a tad smoother as well as the idle is smoother. Just wanted to share with everyone what the new plugs provided.
    Posted via Mobile Device
  5. BUBBA

    BUBBA Foghoon Leghoon Donating Member Registered

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    Bubba (deal with it, I do)
    Thanks for the info,:thumbsup: I have never used anti-seize either.
  6. mike1180

    mike1180 Banned

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    Mike A
    I use the factory gap and also use a little (very little) anti-seize.
    Those plugs should last several years and I pull them every year to inspect, and the coating will wear off IMO.
    HINT: don't torque them to the same tightness if you use anti-seize. :whistle:

    The attached document from NGK tells that anti-seize should be used if the plug is removed and re-installed.

    For spark plugs with special metal plating; do not use anti-seize on the initial installation.
    If a spark plug with special metal plating is removed and re-installed, only then should anti-seize be used prior to “re-installation”.

    Attached Files:

  7. teddypenn

    teddypenn Registered

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    good lookin out on the info.:thumbsup:
  8. Merlot

    Merlot Donating Member Registered

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    thanks for looking into the details.:thumbsup:
  9. Jay Willie

    Jay Willie Donating Member Registered

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    Very good info, thanks for taking the time to pass it along. :thumbsup: :beerchug:

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