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Help! Jetting for in the mountains

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Hi All,

Taking my 2003 DR650 out to the Rocky Mts next week. I will be running between 8,000 and 14,000 ft.

Right now the bike is jetted for sea level in FL. Does anyone know what jet should I use?

Bike has an open airbox and a Supertrapp muffler.


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im pretty sure you need to go waaaaaay smaller on the main jet because the pressure will be alot higher up in the rockys. also adjust the jet needle clip position and lean your bike out

Edited by crf250r07
didnt finish
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