pictures at a motocross race

[webejamn]

i took these last week at the request of a friend of mine, that do you guys think, some turned out really good. but others dont have implied movement, and look odd.
i would like any advice you may have.. thanks,
here is a link to more http://motoxpix.fotopic.net/c1298686.html

[Kiddo]

I like them . The only thing I would have done is zoomed in more on the rider in the second picture! But other than that, good job!!

[webejamn]

yeah i can zoom in on that one alot,,, but with 500 of them i didnt want to mess with them much. what speed do you think would work well for implying movment.