I need to jet my wr250f because I bought it in california out of the crate and its not set for the elevation in Utah. I live at about 5,000 ft. and ride places around that elevation. What is a good jet to put in for this? Also, I am kinda new to dirt bikes but I wanted to know if I should take it into the dealer to do the jet setting or could I do this with my buddy who has done jets before? Is jetting hard to do?