My dad and I are sport bike riders, we have a quad that we dint ride and a 2007 vespa that doesn't get much use, he wants to trade them in for another sport bike and i like the Hayabusa but he likes the kawasaki, i ride a 2008 zx6r and he rides a 2007 ducati monster s2r by the way its my second bike and hes been riding for over 30 years so i dint need safety factors on the bike i just want peoples opinions or experiences on which bike is better.