Welcome to the HQ, yamaha rider. Congrats on the Banshee, they are definitley fun machines!
People have a lot of different opinions on engine break-in, from certain heat cycles, to going strictly by the owners manual.
I ran mine easy for about 4 or 5 tanks of fuel. Ran it at half throttle or less for a tank or two, then three quarter throttle or less for another couple of tanks. (ocasionally wide open bursts, but not holding it wide open for more than a couple of seconds) Also varying the throttle up and down, not keeping it at a constant rpm for too long.
After that I let it rip..