The other day my bike fouled a plug during the first cold start of the day. I didn't have time to fiddle with it so I just put it back in the garage. Today I took the plug out and shot it with some throttle body cleaner that I had in the garage (it was super black and sooty!), put it back in and the darn thing fired and ran great. I'm going to try to take it to the track this weekend to see how it works out. I Just wanted to share this to hopefully save a few people from buying more plugs than you need to!