my factory plug fouled out after 2 or 3 rides. I was kinda concerned, but my dealer told me it was normal due to shipping materials. so, I replaced it with the NGK and put probably 50 hours on the bike and haven't had any more trouble yet. hopefully my dealer knew more than I thought. I thought he was a complete idiot. I've never heard of such a thing.
Oh, Yeah, I asked them about a different plug, such as split fire or some other higher quality plug. they said " nope, don't have it, can't get it, don't think they make it."