the subframe is the aluminum frame underneath the seat. It is welded on for the older Yamahas, and the newer ones they can just snap into place.
I posted some new pics for everyone to see it really isn that bad.
To fix it you can bend it back into place, or buy a new one and have it welded on.
The bike does run, I need to recharge the battery, but in its current state, it would be tough to sit on the seat, you will be sitting on it crooked.