i have a question about adjusting the low speed jet. what are you saposed to look for ? smooth accelleration ? a slight burble on at the very beginning of the accelleration ? i can hear the difference in lean and rich .. im just scared of leaning it out to much.. from factory it seems to be a bit rich on the low end.. and it sounds like its loading up a bit on idle.. should i need to take the caps off the screws on this saw in order to get it dialed in right ? Thanks for any help