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Jetting CRF450R est.5000 ft. elevation?

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I will be taking a trip to Kennedy Meadows and would like to know if I should change the factory jetting or leave it alone. Any advise would be good, I am totally clueless when it comes to jetting.

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158 main jet if the temps are over about 70 degrees, 160 if it is colder, needle clip one clip leaner to position 2, stock pilot, fuel screw around 1.75 turns out. That's a great starting point regardless of mods, and a stock bike will run great like that.

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I will be taking a trip to Kennedy Meadows and would like to know if I should change the factory jetting or leave it alone. Any advise would be good, I am totally clueless when it comes to jetting.

what year?current jetting?

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