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Jetting problem 2007 KX250F

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I live in denver colorado so elevation is about 5,700 ft. The bike currently runs like crap unless it has the choke on so it needs to be richened, no air leak any where either. The bike was bought from a guy who lived in nebraska so jetting is off. currently the main is at 172 and pilot is at 40. it seemed to hesitate most when you rolled the throttle on so went up to just a 42 in the pilot, no luck. tried that along with a 180 main, no luck. fuel screw out 2 1/4 turns. the bike is all stock so just need someone to tell me what all there jetting is at for colorado with FCR37 carb. thanks.

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