Originally Posted by Pleiades

Sounds like your 07 XTX is actually a 2006 bike, without the 02 sensor?

The -10 ECU you bought has single spark ignition and reads from the O2 sensor in the closed loop. Your bike needs either the -00, -01 or the white spot -00 ECU as it has a wasted spark ignition system and no closed loop/02 sensor. The looms/plugs are different so as the different types of cannot be fitted to the wrong bike.