The kit should come with jets, did you purchase it through a dealer? These are not typically sold without corresponding fuel jets.
For your parameters, you should fall in this area for your 05 250;
Main 178 to 175
-0 needle, clip 3 or 2
pilot jet 42, use 45 if it will run clean with it.
air screw 1.25 to 1.75 turns out
The first figure for each circuit is your starting point and should get you very close, the second figure for each circuit is for fine tuning per specific RPM range if needed.
Did you get the main instructions and separate additional instructions for setting the air screw?
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