That sucks. Glad I've got plenty of lower spots around my house that I don't have to worry about that. I do ofter worry about the sewer grate that's on the corner outside. If it backed up and flooded the corner it could potentially flood my basement, but I would hope the water would run the other way. If not I'd be gluing my basement door shut.
On the plus side, I saw some pictures of the triumph some guy bought after it had been in a flood. The guys basement was so full of water that all you could see was the very top inch of the mirrors on the speed triple and an sv650. At least yours was just on the wheels.