Looks ok to me except perhaps the skin tone of the rider is a bit pale. You may want to adjust Hue/saturation or maybe levels in photoshop to warm up the skin tone. A bit of experimentation is a good way to learn PS. Try converting to black and white and see whether you like it.
I think due to the high ISO, there seems to be a lot of noise in the pic. I don't think there is a way I could share the large file with you so it is kinda hard to show you exactly what i mean.
Therefore instead of having a very smooth clear pic, i got a "porous" pic.