NGK CR9EIX - Iridium IX Spark Plug

Installed these (CR9EIX) in my Suzuki Katana 750 and what a difference from the stock plugs which were CR9EK. CR9EK are what they call dual electrodes which run about $10 a plug. Then I read about the CR9EIX plugs and found these on Amazon for about $8 a piece. By nature the Katana is a cold runnning bike but these plugs made warmups faster and the bike runs smoother. Most would say that the ignition system can't support these plugs. I say check with the NGK website or the dealer microfiche. I got 19k out of the stock plugs and NGK says I should get double that with these. And as you know, a Sport Touring bike has many panels to remove and a gas tank before you can see the plug wires. These were worth the time and effort to install rather than the stock plugs.

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I put a set of these in my Suzuki GSXR 600 k7, and they are great! My throttle response has improved because of these.

got a 2002 suzuki gsx-r 600.i first installed NGK standard/regular plugs.3 weeks later i changed them to ngk iridium.I will never go back to regular plugs...with NGK iridium plugs,you can feel the difference...smoother idle and much more horse power due to better spark.