Jessica - Check the Wiki under Break-in
http://www.ninjette.org/wiki/Break-in
Personally, I stayed under 5000 RPM for the first 100 miles. Then I let it get up to 6-7K for the next hundred. Changed the oil and filter at 200. Then let it up to 8-9K and changed the oil only at 350mi. Rode normally but didn't redline it until after the 600 miles service. Now she lives at 11K. 4500miles in. Just did an 800 mile weekend at 9K. Get earplugs.