I was wondering because I did a WOT test in 6th gear and the plugs looked to be lean but it runs good.So I put the snorkel back on and was going to try a wot test again but it seemed like it was rich as hell I couldnt even get going that fast it was loading up and smoking alittle. than I took the snorkel back off and it runs good.So I dont know if it could be lean or not. I'm running 260 mains at 1400 above sea level with just fmf golds.