@schecterguitarsfan i am also 16 and i had a 250r, it was great at first but it is practically screaming going 70mph, and i got very bored of topping out at 87mph, i would definitely go with a 600cc and up, a 500 is pretty much the same as a 250 with the lack of power and speed
is that the stock engine? also what kind of exhaust system do you have on it?