I don't know what I was thinking guys, I went out into my shed last night to get into the engine and fix the broken sprocket thing and it was fine! I could have sworn that the sprocket was broken loose, but it's not. I don't know if it was in my head, I'm probably just remembering it wrong- it happens to me sometimes. So aside from the bad news that I'm wrong about something (should be used to it by now), it's great news that the sprocket is fine.
I also bought new wheels and tires, and fixed the rear sprocket (it was warped from the accident), and got it all hooked up and ready to go.
Now I'm just worried about the frame damage. You can see the damage to the frame in these pics: Tensioner Disaster
My frame was already a little bit bent in that same spot before, and it held up just fine. But this is a bit worse. What do you guys think about the frame?