modified 2002 cr250 jetting?

#1
Hey I am new to this, but I have a 2002 cr250, Engine has been ported and polished by Pro Circuit. It also has pro circuit suspension and pro circuit platinum pipe and Shorty Silencer. Anyways I was looking for some jetting suggestions,
I will be riding around 4300ft elevation. Any suggestions would be greatly Apprecitaed.