iimy kdx has woods pipe very good down low to mid loses a little on top.not a lot but slightly noticeable.air box lid moded and jetted close enogh to be good but not so tight that changes are needed anytime a cloud passes over.40 pilot and 142 main seem to work well 60 to 80 degree's.any warmer and she still run ok with that combo but a little on the sluggish side.needle is in second from top position.have a slight hesitation about1/8 throttle that has'nt been able to adjust out wth needle position or air screw,seem's a bit rich.when i get a little bit of free time will try a needle leaner in the 1/8 range to clear that up.some kdx'rs say that's the nature of the 220 and porting mods will clean it up and others sayneedle and slide are at issue.