So it idles up to 5000 right away and then slowly drops idle speed to normal?

Uhhh.....

Hey, that sucks.
I hear that all new bikes come with a special feature. It's called the 'Make It Work' button, and if you can ever find and press it, you'll have the perfect bike for the life of the machine.
Somebody might have been messing with me too. I'm not sure.....
Maybe it's the idle jets pumping too much fuel at startup, or the choke sticking slightly.
After the wait you had, I would be on that dealer to FIX MY BIKE!!!! , right farkin' now, please.