Follow the owner's manual: 0-500 miles limited to 5,500RPM. 501-1,000 miles limited to 8,000 miles. Over 1,000 and it's broken in.
If you use 5,500 RPM as a shift point during break in, you will be at 105 mph by the time you reach 6th gear. Thus, you rarely need to use 5,500 RPM even in the twisties if you take it easy and not race anyone.
The important thing during break in is BOTH the RPM's and the heating and cooling cycle. Just like forging, riding your bike up to operating temperature, then letting it cool down completely is what strengthen's the internal engine parts. The RPM's is what help's "seat" the parts together. This makes the 500 mile oil change extremely important since you will want to get rid of the "shaved" metal parts from the engine parts seating themselves.
I found my 00 Busa's gearbox a bit notchy until after the 1st oil change and the first run up to 8,000 RPM. I also noticed that the transmission shifts smoothly under high RPM & heavy loads compared to part throttle & light loads. Weird.