Razor MX-350

I have seen a few posts on here about the MX-350, Just wondering this bike is lacking some tork. Is there any thing that a guy can do (Ex.. Change motor, add or change Batteries) with out totaly hacking the thing apart or spending as much on it as the bike it self cost? If So what parts would be needed and were would they be purchased from. The were would you purchase them from is a big question I have, since all the post I have found have very generic discriptions of parts and no links to purchase. Any help would be grate. Oh also I have the newer modles that have the 250 Watt motor not the first gen that had the 350 Watt.