I've done it. It sucked.
I was able to field strip the bike with my KTM tool kit, pull the plugs and crank the water out of the motor using the starter. Also, pull the plug in the exhaust (near the heads) to drain the pipe of water.
I also swapped my battery for my buddies (from his 950) back and forth while cranking my bike to get it running. It took alot of cranking and I didn't want to kill the battery so when it sounded weak we would put it in his bike and idle/charge it while cranking with his battery.
Total took about an hour.
07 Yamaha R6
07 KTM 950 Super Enduro
04 KTM 250exc- plated two-stroke
01 Kawasaki KE100
74 Honda MR50