Thanks, Jim. Yes, you have the right bolt now -- the gold one. It's only job is to hold the sensor in place. Unfortunately, nothing is sticking out, so I couldn't nab it with pliers. I've got some buddies at the local dealership, though, so I might ride out there when the weather clears as I'm sure they'll have an easy-out tool, and they may be willing to help me throw the sprocket on as well.
Now, to google easy-out.
