Tough one here. How much is this cropped? I am always a fan of landscape shots for MX. Portrait are good for jumps or shots the riders etc. In this case, the focus being on the second rider may be my only gripe. I first looked at it and thought it was OOF as i looked at the first rider as it was closer. My only suggestion would be to try a crop where it shows mainly just the riders - but make sure to include the number plates. This way it will tell more of a story. Make sure not to crop it to the point you are losing detail though.
Focus on the front rider use f4 or 5.6 (if three). then you get the competitive aspect; if your client is the front rider f2.8 (shoot for the money..:D)
Comments
Nikon D3 & D3s
2xSB-900 Speedlights
Tokina 12-24 f4, Nikon 50 f1.8, 28-70 f2.8,70-200 f2.8 VR, 1.7x TC , 200-400 f4 vrII
...more to come!
this one is a missed opportunity