Awesome photos and panning. The local track opens up next week and practice is free to go to, so I plan to try my hand at motocross. Have to wait until the kids are out of school though, too much homework to get out.
I like #1 and the last. #1 is a great action shot. It's unfortunate of the sun's position. The last one is great panning, great framing, and the light direction is great. That's a nice sharp shot of the rider with the panning.
I haven't done any panning stuff like this except with my kid racing by me on her bicycle. Can't wait to get to the track.