| Well, FWIW, I just installed a set of NGK CR9EIX's. It's the same plug listed in the book except for it's iridium instead of a standard plug. This plug also has a normal electrode on it instead of the center discharge one like came it...the RG59V. I basically picked up this one because after hitting 7 bike shops in town, this is the only plug I could find. No one had Champions at all, and no one had the standard NGK, just the iridium. Installed just fine and cranked right up. Wanted fresh plugs in for my dyno/custom map session today so I'll pass along any feedback. | 
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