this is what's on the home page:
Motorcycles must have a Snell/DOT helmet with full shield, full-sleeve protective jacket, long pants, and over-the-ankle-shoes. If your motorcycle is quicker than 10.00 or faster than 120mph, you WILL need full protective gear and boots. It's suicide not to. Do not try and get around this, if you're busted, we may eject you from the event and you will forfeit your registration money.