need jetting help

[Brad]

i am in desperate need of jetting help. i am doing the dirt hillclimb at donner ski resort this weekend and i need to rejet or adjust my carb. i dont know anything about it but i rode at knoxville yesterday and it ran rich(felt like the choke was on the whole time). i need to know what size jet i need to order. i have a keihin pwk38 shorty carb on my 2001 kx 250 with a fmf gnarly and turbinecore 2 exhaust.
thanx in advance

[aztec777]

I don't know what altitude you're at now, but Donner is around 8000 feet or so. Too much jet at sea level would be okay at high altitude. I would call a motorcycle shop in Reno or Truckee and ask how they set up their carbs. Good luck!

Steve