Enduro Racer
Not sure if this is too late... But I only found this thread today, and thought I'd post a pic I snapped two weeks ago at the World Enduro Canada race (I was an official photographer there). I massaged the image in PhotoShop a bit to bring out the yellow, crop a bit tighter and reduce the contrast of the surroundings, and added a slight dark fringing effect to enhance the overall image.
Camera: Canon 20D
Lens: 70-200 2.8L (@70mm)
ISO: 400
Shutter: 1/2000 sec
Aperature: f/2.8