Current setup for 900ss, no snorkels, K&N filter, stock pipes:
Main: 145
Pilot: 42.5
Floats: 14mm
Needle: Factory Pro, second position from the top.
Mixture screw: 3 turns out.
Factory Pro needle jets, about 3,000 miles old.
Sea level.
Runs brilliantly. Pulls hard all the way through the rev range and returns mileage in the high 50s.
May tinker with the needle height after I put different pipes on, but my priority was reliable strong running first.
Hope that helps.
Nick