The 1984 San Marino motorcycle Grand Prix was the final race of the 1984 Grand Prix motorcycle racing season. It took place on 1–2 September 1984 at the Mugello Circuit.

Classification 500 cc Pos. Rider Team Manufacturer Time/Retired Points 1 Randy Mamola RM Promotions Honda 49'56.630 15 2 Raymond Roche Honda Total Honda +1.190 12 3 Ron Haslam Honda Racing Corporation Honda +8.390 10 4 Eddie Lawson Marlboro Team Agostini Yamaha +24.460 8 5 Didier de Radiguès Team Elf Chevallier Johnson Honda +41.270 6 6 Rob McElnea Heron Team Suzuki Suzuki +1'00.130 5 7 Leandro Beccheroni Suzuki +1'00.690 4 8 Franco Uncini HB Suzuki GP Team Suzuki +1'05.750 3 9 Boet van Dulmen Suzuki +1'29.510 2 10 Armando Errico Suzuki +1'49.420 1 11 Lorenzo Ghiselli Suzuki +1'50.620 12 Fabio Biliotti Honda +1'50.630 13 Eero Hyvärinen Suzuki +1 lap 14 Massimo Broccoli Honda +1 lap 15 Marco Gentile Yamaha +1 lap 16 Paolo Ferretti Suzuki +1 lap 17 Christopher Bürki Romer Racing Suisse Suzuki +1 lap 18 Alessandro Valesi Suzuki +1 lap 19 Gary Lingham Suzuki +1 lap 20 Steve Parrish Yamaha +1 lap 21 Keith Huewen David Attwood Honda +2 laps Ret Gustav Reiner Olymp-Hemden Racing Honda Accident Ret Reinhold Roth Romer Racing Suisse Honda Retired Ret Christian le Liard Team Elf Chevallier Johnson Chevallier Retired Ret Marco Papa Honda Retired Ret Karl Truchsess Suzuki Retired Ret Barry Sheene Heron Team Suzuki Suzuki Retired Ret Mile Pajic Honda Accident Ret Virginio Ferrari Marlboro Team Agostini Yamaha Retired Ret Massimo Messere Suzuki Accident Ret Hervé Moineau Cagiva Motor Italia Cagiva Accident Ret Wolfgang von Muralt Frankonia-Suzuki Suzuki Retired Ret Rob Punt Suzuki Accident Ret Takazumi Katayama Honda Racing Corporation Honda Retired DNS Klaus Klein Dieter Braun Team Suzuki Did not start DNS Pierre Bolle Suzuki Did not start DNS Wayne Gardner Honda Britain Honda Did not start DNS Sergio Pellandini HB Suzuki GP Team Suzuki Did not start DNQ Louis-Luc Maisto Honda Did not qualify DNQ Massimo Brutti Suzuki Did not qualify DNQ Andreas Leuthe Yamaha Did not qualify Sources:

References