1981 Grand Prix motorcycle racing season developed in the 1950s, to aluminium frames featuring large, twin beams as first pioneered by Spanish constructor, Antonio Cobas. The following Grands Prix were scheduled to take place in 1981: Points are awarded to the top ten finishers. A rider has to finish the race to earn points. 1981 Grand Prix motorcycle racing season The 1981 Grand Prix motorcycle racing season was the 33rd F.I.M. Road Racing World Championship season. Suzuki riders Marco Lucchinelli and Randy Mamola battled it out to the final race of the season with the Italian rider claiming the crown and Mamola finishing runner-up for the
1978 Grand Prix motorcycle racing season then won his first-ever 500 cc Grand Prix with a win at the Austrian Grand Prix, quickly followed by two more victories in France and Italy to take the championship points lead. Hennen's promising career was cut short when he suffered head injuries while competing in the Isle of Man TT during a break in the Grand Prix season schedule. Cecotto won the Dutch TT with Roberts finishing ahead of a resurgent Sheene in third place. Hartog would claim the Belgian Grand Prix for Suzuki with Roberts and Sheene once again finishing in second and third places respectively. At the