The 1981 Nations motorcycle Grand Prix was the fourth race of the 1981 Grand Prix motorcycle racing season. It took place on the weekend of 8–10 May 1981 at the Autodromo Nazionale Monza.
Classification 500 cc Pos. Rider Team Manufacturer Time/Retired Points 1 Kenny Roberts Yamaha Motor Company Yamaha 52'02.100 15 2 Graeme Crosby Ingersoll Herin Team Suzuki Suzuki +4.650 12 3 Barry Sheene Yamaha +8.150 10 4 Boet van Dulmen Yamaha +33.480 8 5 Marco Lucchinelli Team Nava Suzuki Suzuki +36.170 6 6 Guido Paci Yamaha +37.120 5 7 Jack Middelburg Racing Westland Suzuki +1'21.650 4 8 Franco Uncini Suzuki +1'26.220 3 9 Christian Sarron Team Sonauto Gauloises Yamaha +1'36.480 2 10 Sergio Pellandini Suzuki +1'52.070 1 11 Leandro Becheroni Suzuki +1'55.910 12 Gianni Rolando Lombardini +1 lap 13 Walter Migliorati Suzuki +1 lap 14 Sadao Asami Yamaha +1 lap 15 Raymond Roche Suzuki +1 lap 16 Seppo Rossi Suzuki +1 lap 17 Keith Huewen Heron Suzuki GB Suzuki +1 lap 18 Alain Rothlisberger Suzuki +2 laps 19 Stuart Avant Ellis Racing Suzuki +2 laps 20 Marco Papa Suzuki +2 laps 21 Peter Sjöström Suzuki +2 laps Ret Takazumi Katayama Honda International Racing Honda Retired Ret Marc Fontan Team Sonauto Gauloises Yamaha Retired Ret Fabio Biliotti Suzuki Retired Ret Christian Estrosi Suzuki Retired Ret Virginio Ferrari Cagiva Corse Cagiva Retired Ret Philippe Coulon Suzuki Retired Ret Graziano Rossi Morbidelli Morbidelli Retired Ret Gianni Pelletier Suzuki Retired Ret Kork Ballington Team Kawasaki Kawasaki Retired Ret Gustav Reiner Team Solitude Deutschland Solo Retired Ret Dave Potter Yamaha Retired Ret Randy Mamola Ingersoll Herin Team Suzuki Suzuki Retired Ret Adelio Faccioli Suzuki Retired Ret Hiroyuki Kawasaki Ingersoll Herin Team Suzuki Suzuki Retired DNS Steve Parrish Team Mitsui Yamaha Yamaha Did not start DNS Carlo Perugini Moto Sanvenero Sanvenero Did not start DNQ Franck Gross Suzuki Did not qualify DNQ Jon Ekerold Team Solitude Deutschland Solo Did not qualify DNQ Josef Hage Dieter Braun Team Yamaha Did not qualify DNQ Michael Schmid Suzuki Did not qualify DNQ Roberto Pietri Suzuki Did not qualify DNQ Marco Greco Yamaha Did not qualify Sources:
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