I understand a difference between 250's 6's and 9's, but once you reach 10's what's the point? Why buy a 10 when you can have a 12? Why a 12 when you can have 14? Why a 14 when you can save money and get a 9? I guess what I'm really asking is: Once you hit 1000cc can you really notice a difference in 200cc? Is this power even streetable? A 600cc bike, these days, can make 80+ horsepower and an assload of torque, which is more than enough to break 120 mph... quickly. So why spend the money on bike that will progressively get heavier with the bigger displacement? And why is there so many choices once you get to 1000+ cc?