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
1998 Grand Prix motorcycle racing season 125 title for Aprilia after a tight battle with Tomomi Manako and Marco Melandri. The following Grands Prix were scheduled to take place in 1998: †† = Saturday race †† = Saturday race Points were awarded to the top fifteen finishers. A rider had to finish the race to earn points. Points were awarded to the top fifteen finishers. A rider had to finish the race to earn points. Points were awarded to the top fifteen finishers. A rider had to finish the race to earn points. 1998 Grand Prix motorcycle racing season The 1998 Grand Prix motorcycle racing season