the thing that seems to be the biggest issue when talking about size other than weighin more than 300 lbs is height......my one friend is 6'5" and he can't really comfortably ride the 600ss bikes or even most of the new liter bikes he says their too small and narrow......hes partial to big bikes like busa zx12/14....he rides an 97 yzf1000 thunderace the thing is huge