OK, this should be good for starting some arguments.... Do you spend guys really spend $6 to $12 for premium spark plugs for your 2-stroke? I buy Autolite 4062 or 4063 at Advance Auto parts for $2. I install a new one just before every race (Hare Scrambles, where you have to run to bike and start it). I NEED that bike to start on the first kick. I have not had any problems, and bike runs great. Actually, it usually starts on first kick even if plug has been in there for a longer time. My reasoning is that I'd rather have a NEW plug more oftern than a more expensive one that "lasts longer". I have seen many "racing" plugs get carbon fouled, and cleaning them doesn't work. RockAuto dot com has them for $1.42 right now, with a $1 rebate (limit 16). They are a good match for my $9 per gallon WalMart brand 2-stroke oil!