Have any of you guys ever ridden a 125cc or 250cc 2-stroke with the power valves stuck open? They make absolutely no bottom end power at all. The V-Spec you mentioned is a 3 port, the XP is a 9 port, so all the tuning in the world will not find this engine any bottom end. Bottom end of story. Sell that motor to an Oval guy, they are always pinned and that Motor is perfect for that application. An Oval track is about the only place you could keep the XP in it's powerband.