Just seen the whole thing, and I must say, that is the smoothest track I have ever seen. The tracks in 1977 up here in New England were rougher in their smoothest sections than anywhere on that track. In fact, my vintage track is rougher. Only the jumping is technical. Pathetic!
That is definitely a better track for a lower horspower bike with flywheel effect, which is why the rider on the fart machine had a chance. I stopped watching pro races 6 years ago because they were boring, they changed the tracks to suit the 4 strokes, and too loud.