Motocross is a form of motorcycle racing held on enclosed off-road circuits. The sport envolved from motorcycled trails competitions held in united kingdom. Motocross is a physically demanding sport held in all weather conditions. 7 most famous motocross riders. Ricky Carmicheal in first position from 1991 to 2007. Next is Bob Hannah, aka “Hurricane” from 1976-1985. Roger DeCoster. Ricky Johnson takes fourth place.Jeremy McGrath in fifth place. In sixth place is french rider Jean-Micheal Bayle. Making the seventh slot is Jeff Ward, king of the 80’s . THE BEST MOTOCROSS DIRT BIKES Yamaha YZ450F Honda CRF450R Yamaha YZ250F Kawasaki KX250F Suzuki RM450F.