440ex Jetting help

[Groves187]

Ok, right now i have a 170m and a 38p. I just took the choke out of my carb so i am gonna be goin to a 42p (unless someone has ran a different size). Not to sure about my main jet or my needle clip position. temps are 70-90 and Elevation is 1396'. My mods are 440 BB with 11.5-1 Piston, White Brothers E-Series Exhuast (no Spark arrester) Twinair air filter no air box lid. Any help would be great.

Thanks, Nick