A Shrunken YZ250 for the Track: Anton Bongaerts races motorcycles on tracks…go-kart tracks, that is. The Circuit de Spa-Francorchamps in Stevelot, Belgium, or Spa as locals and regulars refer to it, is a just over 7-kilometer (4.35 mile) Formula 1 Grand Prix track that will let you run the tight and swoopy inner go-kart track for just €50 a day on a bike. So yeah, why not?
The tight bends of the go-kart track make bigger bikes feel a bit cumbersome and, well, slower. Twenty years ago Bongaerts built, raced, and even won a local championship riding a home-built bike with a Minarelli 70cc engine on the tiny tracks. He graduated to supermotos, but decided they were too big and heavy to really have fun.…