When I tried to start my Hornet this morning, the starter motor turned for a split second and then "click" - stuck. The engine wouldn't turn over by hand, so I pulled the plugs and, sure enough, cylinder #3 was hydro locked. Ok, problem solved - but what on Earth could have caused the lock to occur sometime between when I parked the bike last night and when I got to it the next morning? The vacuum-operated fuel tap is not leaking. Cylinder #3 is sparking fine and heating up in sync with the other cylinders. The is no sign of coolant entering the combustion chamber - no smoking, and the liquid spat out appeared to be fuel. So it's a mystery. Any ideas? The only thing that I can think of is that the float in carb #3 is malfunctioning, and the fuel left over in the fuel line was enough to feed in, via gravity, and flood the cylinder. I wish I'd checked the line to see if it was empty when I pulled the tank!