I've knocked this loose when washing and bike wouldn't start. Check to see if this is the problem:
Above the starter, towards the back of the engine compartment, is a heavy cable that's bolted to the starter. The cable is covered in a black flexible tubing. Behind this cable is a male/female plug that is mostly blocked from view by the aforementioned cable. Check to see if you've knocked this plug loose. It's real tight in this area and you may have to unbolt the heavy cable to get your hands in there. Best view is from the left side of the bike...may even need a flashlight.
Anyway, I've knocked this loose before and bike will turn over, lights will work, etc, but will not start. The plug should "click" together and may look like it is connected, when really it isn't.