He probably built it himself. The first guy to do 200mph on two wheels used to live up the road from me. That was an awesome bike! He also had the only all female pit-crew EVER in pro racing. He died racing. They think he had a heart attack.
it wasnt even a piston that came flying out... read the comments made on the video it was some part of the airbox...plus if u pause the video at the right time u can clearly tell it isnt a piston
You must have a better puter than me because I can't clearly tell anything. It looks like his glove that goes out in front of the bike. Here is another vid of the same thing. http://www.brockracing.com/media/brockatco_NEW.wmv