What!!?? You haven't rejetted already!!??
What is your address?? Vee need to pay Yuu a veezit!!
Sieg Hiel (..or something.......)
Nah...If you're still running OEM jetting, you should still be OK with a pipe add. Still, there are huge benefits to be gained from a properly jetted bike.
That and the sea level part would concern me somewhat. My bike is a bit more modified than 'air-box'...but my bike is pretty lean with oem jetting on the coast (well...and in the sand to boot). Woods riding wouldn't be as non-forgiving as WOT-all-the-time dune hopping.