I have ridden other's sportbikes off and on over the years. I know it's not the same and I will be a beginner when I cop my own bike this spring. I check out the books, the DVDs, and MSF courses and all. The sport bike rags suggest never starting out on a liter bike. Some people suggest now even buying a new 600. I am 35, will protect the bike with the frame, swing arm, bar sliders and all. I will take my time to learn the bike and not push before I am ready. My friend tried to sell me his '98 GSX-R. He says it's perfect to start for a 6'2 230 lbs rider like myself. He says while 600s are easier to handle and learn on I will quickly outgrow it. As long as my knees aren't in my chin, I do not have a problem with 600's. My brothers GSX-R 600 feels fine. I do not need or want the liter bike at this point and am digging the undertail exhausts of the Kawasaki and Honda 600s. The '04 GSX-R 750 is the last 3/4 Japanese bike anyways. What to you guys thing about starting out on the supermiddleweight Ninja ZX-6R (636 cc)?