Neil Hudson won what premier motocross championship in 1981?
Motocross World Championship FIM Motocross World Championship is the premier championship of motocross racing, organized by the Fédération Internationale de Motocyclisme (FIM), currently divided into two distinct classes: MX1 and MX2. Race duration is 30 minutes plus 2 laps per moto. The series runs 18 events with two motos at each round.
Billy Griggs William Luther Griggs (b. September 16, 1968 from Anaheim, California U.S.) is an American "Old School/Mid School" former professional Bicycle Motocross (BMX) racer whose prime competitive years were from 1985 to 1996.