Hell, I've been riding for 6+ years, doing track days since 2008, racing the last couple of years, and I don't even need (or really want) anything bigger than an older 600 for street use. I'm no pro racer, but I consider myself quite competent on a motorcycle, and I could still get myself into trouble on a 'busa... My standard line is generally "that much power just adds additional ways you can make a mistake. Accidental power wheelies or spinning the rear wheel are seriously bad scenarios for ANY rider, let alone a newer rider." Furthermore, the potential for greater speed means that there's potential for more panic braking situations, which innevitably end with "had to lay 'er down" stories, if the rider is lucky enough to be conscious and speaking thereafter... My first bike was an EX500, and I can think of at least 3 times where I had close calls on THAT bike that would have been wrecks on a 600...