[QUOTE=queretaro;841054]If it is running fine now, how will you know if it improves with a swap to the high priced plugs? I've run copper Autolite plugs in my 95 r1100r for the last 6 years without any trouble. Although I don't put a lot of miles on them, every year I put in a new set, the old ones look perfect. They cost about $1.50 each at WalMart.
That's a good question. I'm not expecting any improvement, I'm more curious if I will be able to tell the difference at all. I'm sure there's a reason why BMW specified dual electrode plugs. Mostly my curiosity at work.