Coyote Kit rejetting

[brenpak]

I need your guidance once again guys, This is what ive done so far to my 99' Nomad. I marbled the reed valves, removed the air box, and removed the left side cover completely. I made my own backing plate so I can install a K&N filter e-3320 Which is only 6 1/4 " in diameter, filtering off the carb on the right. instead of the 8 1/2" that is said in the coyote kit instructions. It says I should start out with a 170 main jet and 3 to3 1/2 turns out on the pilot jet, now that is with a 8 1/2" filter does anyone have any advice or recommendations on what jet size I should start out with? with having a 6 1/4"filter or does it matter? or is it trial and error?
Hopefully someone tried this before and might be willing to share some info :)