I've done the 100-100-100 a couple of times lately. Not this year, though, as the weather was terrible. That's on the 100th day of the year, usually April 10th, with a bike and rider combined age of 100 years, a 100 mile ride, hitting 100 mph at least once and a bonus for finishing in less than 100 minutes. The stretch I use has a nice straight with excellent visibility and no cross roads. I like to count for speedo error, so will go to 175 kph or so. The bike is reasonably stable, but nowhere near as stable as a more modern bike. Mine still has it's shocks from 1977 and likes to wallow in high speed corners if there are any bumps, so I limit them to 120 kph or so.