Just bought a new 2012 WR450F, checked the forums for info on derestricting the factory settings. Lots of good info, but i didnt get a concensus on what has to be done. My question is, can i simply replace the throttle stop screw and be done if im not looking to get full race potential. or do i have to buy pipe, ecu, tuner tool etc. to make sure the bike is not running to lean or to rich. Im kind of pissed at the whole situation and dont want to have to spend extra money to get what i paid 7k to get. Thanks in advance for any advice. Let me elaborate. My son is coming home from deployment and he asked me to get his money and go purchase what he had decided on. I kind of feel like Yamaha should be responsible for delivering the bike that they advertise.