sentences:  Jon Ekerold
  
  Born in Johannesburg, South Africa, Ekerold is one of the few racers in the modern era to have won a world championship as a privateer without the benefit of a motorcycle manufacturer's support when he defeated Kawasaki factory racing team rider Anton Mang for the 1980 350cc Grand Prix road racing world championship.Ekerold rode a self-modified Yamaha TZ350 engine in a Bimota chassis during his championship season.