why would you want to go faster, this has always intrested me, as I am thinking of going from a 700 to a 500. what do you want to do with the extra speed, race, jump, keep up with your dad, these are all questions you need to think about, because you are asking alot from a sled that was not designed for high speed. with new found power you will need now shocks, (all of them), new skies, and a new track, by the time you pay for all of this stuff to make your sled safer at higher speeds, you could buy a different sled, but than you would still have to deal with your size. I say keep what you have, learn to ride it better than you already do, than move up to a bigger motor sled, just my opinion, your parents will do what is right for you, when that time comes.