Lesson learned:
"Never underestimate people's lack of respect for others or their property."
After an uneventful 70 mile ride saturday I decided to start tracing the fuel flow, starting with completely draining the tank. As the tank neared it's final few ounces of gas we noticed a, (GET THIS) 1 inch by 1.5 inch of paper moving around in the last of the gas.

Removed the petcock and was able to grab it with tweezers and pull it through. Seems some A-hole folded up a cash register receipt and put it in my tank. see attached photo
I'm relieved it wasn't something amiss with the bike but my blood still boils thinking of what could have happened if I lost power at the wrong time.
I will be much more religious about locking my filler cap at all times.

[/img]