Possibly a derby, but a good segment from Leno's program, courtest of superbikeplanet:
http://www.superbikeplanet.com/2008/Oct/091016arai.htm (http://www.superbikeplanet.com/2008/Oct/091016arai.htm)
I think someone posted it in Gear a few weeks back, but that kind of info always bears repeating. Wear your brain bucket!