I'm quite experienced jetting/tuning a holley 4bbl carb for hot rods but when it comes to jetting my CR250 I could really use some help. It really runs great and has a medium brown plug color, but I keep hearing how you can improve throttle response and such. I'm kind of confused as to which jet(pilot,main etc...) does what.Anybody have any tips or maybe point me to a good website? Or maybe I should just leave well enough alone. Thanks