Has anyone had a throttle body modification done on their 2011 or 2010 YZ 450? I'm not talking about reprogramming, but an actual physical modification? I am looking for information on this modification and who performs them. We have a new GYTR head and Vance and Hines pipe combination we want to try, and we would like to get the butterfly at least modified to provide a smother laminar air flow at initial opening. We also feel that the butterfly valve doesn't completely open at full throttle, but the shop doesn't have the sophisticated hardware/software to calibrate the TPS and the programming.