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question on jetting for 10,000 ft

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My dad is jacking my bike and taking it up to the mountains this weekend so I need to re-jet it for him. I only ride track so I have never taken the bike that high. What do you guys recommend for jetting? My bike is a 07 crf250r. Thanks

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well not sure for a 250, but on my 450 i run a 72 main at sea level and a 62 for 5-10k feet... if your alreadt jetted for the front range you might be fine, but chaning the main down a bit and dont forget to lean out the fuel screw a bit as well.

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