I've been using a champion L78C in the black bike and I did the ground electrode mod to it and run about 0.017 gap and its working great.
I went to this plug after I started having problems with the china plug I started to have problems with it as it kept fowling out, I'd clean it and it would work for awhile then fowl out. So I caned it and tried the champ and I can't leave good enough alone so I did the tip mod just cause I could.
My 2 cents
