It's true to properly set the idle screw you turn it all the way to the left till it starts to miss, then all the way to the right till it does the same thing, then right in the middle is perfect. I haven't seen anyone say they set their air screw and leaner than 2.5 or richer than 3.0 turns. 2.5 being the factory setting, 3.0 being what most everyone with mods seems to use (though a lot have 2.75.) I did the full test on mine, and came out with three turns so I figure at this point it's just easier to go with what everyone else has done. [img]i/expressions/face-icon-small-tongue.gif[/img] However for perfection, finding both extremes is a better more perfect answer.