Here is a pic of the water pump housing on my drz400, This had to happen on a previous ride when I droped it big time, I then rode rest of that day (another 30 miles), then another 54 mile ride last friday. I didnt notice it until now, or I woudlnt have rode last friday. I took the hose off, and no water came out, so I poured some in the top of radiator and it came out the bottom, so theres NO WATER in the radiaotr, or at least this side? could there possibly still be water in the other side that kept it cool on the 54 mile ride? there is a little coolent in the overflow tank. I rode it 54 miles last friday, and it's still running.. Looks like if there is no water in it, teh motor would have seized up? should I be concerned? anything i should check, other then replacing the housing, and filling it back up with coolent? is it possible the other side of radiator has coolent in it or had coolent in it? or if this side is empty, should I assume the other side is empty also?