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so..I had to change the starter on my van on the side of the road.Lucky me there was a parts store one block away.I told the dude to to gimmie 4 B6es plugs.Went home and you know the rest.So I checked out the NGK web site and saw no difference between the length of the B6es vs. the BP6es, Execpt there is more thread covering the end.So I gave them a try and my bike is running sweet.I was having trouble fouling out plugs but not now.500 miles since that change.What do you guys think????