at least you were subtle. just kidding. a couple things:
1. i got dizzy at about 1:30 and turned it off. chill out with your camera movement. ask yourself during any shot why you need to move the camera. Is it just because you can? remember that doesn't make it a good reason to do it.
2. why did you make the girls so obvious and b movie? obvious = boring. I think I would have watched longer if you gave suggestions that they were indeed women under the gear. like for instance, if you showed some motocross guy (you think) ripping big airs, and then maybe you see long hair flying out of the helmet (suggestion) and then maybe something else.. building all the way to the end where you reveal that it's actually a woman who has been busting all those big airs and whatnot. that would have been more interesting to me than the girls just instantly stripping and getting all light porn.
3. also, you should have left the ladies footage in full color. leaving both scenes in that non-contrasty sepia just looked unfinished.