Just bought me a Kawasaki Ninja 500. I really love the bike, but I am completely new to sportsbikes so I have a question to ask. This bike has plenty of power for what I want, but I noticed that when I get on the freeway and get it up to 65mph to run along with traffic, in highest gear the tachometer is reading about 5,500 rpm. Now I know that it is not in the red until much much higher than that, but if I were to cruise on the interstate for like an hour at that speed and rpms, will it put a lot of stress on the engine over time or is it made to handle that? I realize that it has to be properly broken in first, but my question is after properly breaking the bike in and riding it a lot at that power setting. A few guys I talked to said that that is completely normal rpm to run the bike at and it would not put very much stress on the engine at all but would only burn gas a little quicker. Is this pretty much right? I don't want to sound stupid but I know nothing about these bikes and I sure don't want to harm the engine over time. Any input would be great! Thanks!