2015 Fe350 Rebuild

I am rebuilding my bike this winter, it is all apart and now i am going through the process of cleaning, organizing and determining what needs servicing or replaced.

I have the throttle body out and cleaned - pulled all sensors and cleaned - flushed injector.

1-Is there anything else that should be done?
2-When installing the throttle position sensor, the screw hole on the sensor is slotted, why and how do you know at which position to lock it in?

I do not think your bike is Italian. Isn't 2015 the 1st year of KTM/Husky?