My buddy has left his 650 parked outside since he bought it 5 years ago. He tried a folding cover but that failed when it snowed, twice, then he just put a regular cover over it and forgot about it until someone tried to steal it one day, punched out the ignition, there was no battery in it anyways.
I'm afraid to go over to his house now to see it, all rusting and unloved. He doesn't even bother to try to sell it, keeps saying he is going to fix the ignition, but never does.
I told him to put it in his living room after he bought it, it would have been pretty cool sitting in there, all dry and clean and waxed. Nope.
Now its halfway through November, so another 4 months and I can start looking at insurance for mine, sitting in a heated garage, all clean and waxed and ready for another season when things warm up and the rain/snow stops.