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08 crf250r jet size

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hey guys ive been trying to find out why my crf wont idle worth a crap and determined that the jetting wasn't right after checking the carb. i was wondering what jet sizes would be good for 5000 feet and sometimes higher altitudes.

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I'd have to make a wild guess and say a 45-48 pilot and a 175 main. With altitudes like what you're dealing with, you have to go richer.

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I'd have to make a wild guess and say a 45-48 pilot and a 175 main. With altitudes like what you're dealing with, you have to go richer.

Isn't it the other way around? You go leaner at higher altitude.

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Now you got me second guessing! I'm pretty sure that you have to go richer. Someone please correct me if I'm wrong.

Edited by Charlie C

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