I havent a clue. Id go burn off half a tank of gas, get it to start running crappy again, and then drive it directly to the dealer and ask them WTF?? That just doesnt sound right.
Another thing that doesnt make sense is how you wrote this up...you say that you have to drop the RPMs to 3K before it starts picking up power. Are you running it in 2nd gear at 10K RPMs constantly or something?? Are you breaking it in properly?? The bike naturally makes a lot of low and mid end power - so its tough to say what it is...
Good luck bro!