What size jets? 04 ktm 351/ JD Jet Kit

I have a 2004 ktm 250rfs with the HT-Racing 351 kit with their head work, Ktm sx exhaust and a powernow in the carb. I'm looking for jetting from sea level to 4000 feet in elevation. I have the JD jet kit but when I bought it my bike was still a 250. The needle should still work just wondering what set up I should use ? Jet size, needle & clip position?? Thanks for the help.

Remove the powernow, it is snake oil, reduces performance and also make proper jetting near impossible.

Install the JD kit, follow the included instructions EXACTLY for your altitude. Ride the bike, you may have to go slightly leaner than the kit suggests.

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