250r Jetting ?

[shogun_98]

I have a stock 250r and im putting a 38mm A/S on it. What would be a good main jet to use?

[Narly R]

What elevation r u at, and what is the normal temp?

[shogun_98]

the elevation is 1450 ft above sea level, Im in Pennsylvania, but the temp is around 30 or warmer when i ride atleast.
It has a bills pipe on it also