Nice shadow on the trail below him! I've taken a few mountain biking shots and I know that timing can be hard sometimes... I think that you've got great motion and that awesome shadow, now all you have to do is crop about 1/6th off the right side of the image! Welcome to usefilm.
Hi brett, welcome to usefilm... This is a great action shot, I would suggest a bit of a crop on the right as you mention you exposed for the rider, thus the darkness on the right. The dark is ok, just a tad too much of it is all, in my opinion anyhow. This illustrates a good sense of speed and a great reflection. look forward to more posts.