XRTT
During the four years that I raced with the American Federation of Motorcyclists, I was the editor of Lap Times, the AFM newsletter. The benefits of this was that I could get into the AMA races with a press pass. Even though, the Lap Times only covered AFM races, perks is perks.
I'd gotten used to H2R's and TD350's shrieking up behind me on the track. But, when Art Bernheisel's kid came up behind me just before the esses at Sears Point, I felt the earth shake as much as I heard him. He scared me off my line when he went by me. The only other time this happened was at Ontario when Reg Pridmore passed me. Not as overwhelming as the XRTT. There's nothing like the boom of a four stroke.
The XRTT is the same model bike that Mark Brelsford's career ended on. Mark's teammate Larry Darr crashed his XRTT. On the next lap, Mark came around so close that Mark's tank hit Larry's clipon sending a 9 gallon fireball up between Mark's legs. This image is taken from ESPN coverage showing Mark in a fireball with hands protectively up in front of his face still doing over a ton. That dark chunk on the right 1/3 of the way from the bottom is the wheel and fairing of Darr's bike. Mark was noted as one of the best mile flattrackers that ever lived. He retired to Alaska.