Check Dinques site he has a jet calculator that works. No guessing. just download it and type in your configuration and altitude and it tells you what jets you need. It really woirk I have tested it on several bikes now and I know of several people on this site who have used it as well. You will find that and other useful info here.
http://www.dinqua.com/index.html

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!