I'd look for the loose wire. I've bent the float assembly with the gas nozzle on a motorcycle tank before - but you can't reach it on the Xciting.
The connector I would check first comes off of the top of the fuel tank, and over to the left. I'm not sure how much you'll have to remove - but it's about where your left ankle is while you are riding. I believe the connector on the panel has other things on it - so it is unlikely just the fuel level would stop working.
Good luck - let us know what you find...