Re: I changed my oil but now it won't turn over
Yeah you're right, that's symptomatic of the kill switch being off. When you thumb the starter does the headlight or any of the lights dim? I'm expecting they won't. Maybe a sensor has become disconnected when you were working on it, and that is stopping the bike from starting, if that's even possible. I don't know if there are any faults that would kill the ignition.
Do you have an alarm/immobiliser on it?