You always want to set your main before any other circuits. Go out and run the bike hard for about 5 to 10 minutes in an area where you can keep it in the wide open position most of the time. A nice open field works great where you can keep it wide open for a couple hundred yards and then back off the throttle to turn and then get right back on the main again. Kill the bike immediately and do a plug check. You should jet for a nice light brown plug color. White too lean, dark brown too rich. Once you get the main set then go straight to the idle circuit. Bike should idle at its best at 1 to 3 turns out on the air screw. If its less than 1 you need a bigger pilot, if its more than 3 you need a smaller pilot. Now comes the fun part trying to get the right size needle to make it run the way you like it. Everybody has there own special needle that seems to work for them. I have had good results with the YZ needles, N3ew,N3cj and N3cw.
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