Isle of Man TT.

http://www.youtube.com/watch?v=OAoWRDGix6g

I watched that once on T.V years ago and it was even more insane than the video you posted because it was pouring rain and those cats were going just as fast.From what I've heard about the Isle of Man race, there have been quite a few riders who have been killed running it and by watching it you can see why. Those guys are insane!!

Vukie
I have some tapes of the Isle of Man, the track is 38.8 miles around I think. Many rider live there life, and die just for that race. 2010 race starts Saturday, rarely do any American riders run it.

Used to be on Speed.
http://en.wikipedia.org/wiki/Isle_of_Man_TT

speed used to have open wheel racing also. they suck now

Last years was on Discovery HD, showed Bostrom(spelling) watching the race saying these guy's are nuts.