I found it to be extremely tough to shoot bike wrecks. Not for lack of trying. When shooting a race, you are normally viewing the world through a long lens, focused on a single rider or pack of riders on a far turn. When you finally take the camera from your eye, you see the cloud of dust and wreckage right in front of you and the ambulance already on its way.
After shooting two seasons of the club racing circuit in California, I was able to capture a handful of wrecks on film. Here is the sequence of the only one in color from the Buttonwillow Raceway Park in November of 2005. Shot with a Nikon D200, 80-200mm.
Click here to view an animated gif of the wreck.