i have read the jetting thread and i did a search. I have an 06 450 and when its idling and i wack the throttle it bogs or hesitates then hits. Is this common? it seems to get better as i move out the air screw but should it be out 3 1/4-1/2 turns out? I have tried the 170 main, 168 main and 165 and i have tried the 45 pilot with the 168 and 170. now i dont notice it much while ridding but if your sitting there idling and just wack it, it does it which leads me to think something needs an adjustment. or is this what the boysen quick shot fixes. I am new to 4 strokes so any help is apreciated.