Leave needle in center position, 27.5 Pilots, 340 Mains. You may even need to go down to 330 or 320 Main. I would think 27.5 Pilots would be about right but there is a possibility you will have to go up to 30's. Air screws need to be 2 turns out and make sure they are in sync. Do a plug chop and let us know how it turned out. CPI's kick ass, you will be very happy