High altitude jetting

I am looking for some high altitude jetting tips for my 400E/XC.Will be riding between 5000 and 12000 feet.



Just came back from Colorado was riding

between 8-13. I dropped the needle one

and put a 160 main in and adjusted the

fuel screw. - Ran great but could have been a little leaner on the main... didn't burble

or anything just didn't want to rev out




"01" KTM 520 EXC

Mesa, AZ

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