Any one using different to OEM sparkplug?

I know good plugs can make a big difference and was just wondering what alternatives others are using for our bikes.

Anyone experimented with different heat ranges?

havnt tried diff heat ranges, but have used a splitfire, which was good

and now using a NGK iridium, (CR8EIX) seems to go alright, paid about $16 from bursons

My buddy NCMountainman is using a CR9EIX cooler plug in his YZ450. Seems to work very well. He says the motor runs a little cooler in race conditions. He has not had trouble starting or fouling. :banghead:

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