1987 250cc Grand Prix leading entries:
| no. | rider | entrant | bike |
| 1 | Carlos Lavado VEN | HB-Venemotos | Yamaha YZR |
| 2 | Sito Pons ESP | Campsa-Honda | Honda NSR |
| 3 | Dominique Sarron FRA | Rothmans Honda France | Honda NSR |
| 4 | Anton Mang BRD | Rothmans Honda | Honda NSR |
| 5 | Jean-François Baldé FRA | Pole Position/Ville d’Hyeres | Honda RS |
| 5 | Jean-François Baldé FRA | Defi | Defi-Rotax |
| 6 | Martin Wimmer BRD | Marlboro Yamaha Team Agostini | Yamaha YZR |
| 22 | Luca Cadalora ITA | Marlboro Yamaha Team Agostini | Yamaha YZR |
| Massimo Messere ITA* | Marlboro Yamaha Team Agostini | Yamaha | |
| 7 | Jacques Cornu SUI | Team Parisienne-Elf | Honda NSR |
| 23 | Urs Lüzi SUI* | Team Parisienne-Elf | Honda NSR |
| 55 | Bernard Hänggeli SUI** | Team Parisienne-Elf | Honda RS |
| 8 | Fausto Ricci ITA | Team Iberna | Honda RS |
| 10 | Donnie McLeod SCO | Honda RS | |
| 10 | Donnie McLeod SCO | Pepsi/Ehrlich Automotive | EMC-Rotax |
| 12 | Carlos Cardús ESP | Team Ducados Angel Nieto | Honda NSR |
| 14 | Stéphane Mertens BEL | Racing Team Katayama | Sekitoba-Honda |
| 15 | Virginio Ferrari ITA** | Racing Team Katayama | Sekitoba-Honda |
| 16 | Maurizio Vitali ITA | Team Italia Garelli | Garelli 250GP |
| 17 | Patrick Igoa FRA | Sonauto Gauloises | Yamaha YZR |
| 21 | Jean-Philippe Ruggia FRA* | Sonauto Gauloises | Yamaha YZR |
| 21 | Jean-Philippe Ruggia FRA | Sonauto Yamaha | Yamaha TZ |
| 19 | Jean Foray FRA | Chevallier-Yam. | |
| 20 | Hans Lindner AUT | Atomic Road Racing Team | Honda RS |
| 24 | Reinhold Roth BRD | HB Römer Team | Honda NSR |
| 34 | Harald Eckl BRD# | Römer Racing Team | Honda RS |
| 25 | Jean-Michel Mattioli FRA | Honda France | Honda RS |
| 27 | Manfred Herweh BRD | Honda RS | |
| 31 | Juan Garriga ESP | Ducados-Yamaha Racing | Yamaha YZR |
| 32 | Loris Reggiani ITA# | Team Aprilia | Aprilia AFI-R’t’x |
| 36 | Guy Bertin FRA | Pave d’Affinois | Honda RS |
| 38 | Kevin Mitchell ENG | D Gallacher - Bradgate Containers | Yamaha/Honda |
| 41 | Gary Cowan NIR | East West Transport | Honda RS |
| 43 | Masahiro Shimizu JAP**# | Ajinomoto | Honda NSR |
| 44 | Masaru Kobayashi JAP** | Ajinomoto | Honda NSR |
| 43 | Siegfried Minich AUT | HOMA Racing Team | Honda RS |
| 45 | Jochen Schmid BRD | Mitsui-Yamaha | Yamaha TZ |
| 48 | Bruno Bonhuil FRA | M.T.D. | Honda RS |
| 49 | Ivan Palazzese VEN# | F.M.V. | Yamaha TZ |
| Stefano Caracchi RSM | Gazzaniga Corse | Gazzaniga-R’t’x | |
| 49 | Stefano Caracchi RSM | Angelo Gazzaniga | Honda RS |
| 55 | René Délaby LUX | Yamaha TZ | |
| Alain Bronec FRA | Honda RS | ||
| Alan Carter ENG** | Moriwaki | Honda NSR | |
| Hervé Duffard FRA | Honda RS | ||
| Urs Lüzi SUI | Honda RS | ||
| Alberto Rota ITA | Honda RS |
* substitute rider
** selected races only
# Eckl also raced number 32
# Reggiani also raced numbers 18, 30, 41, 36 and 34
# Shimizu also raced number 45
# Palazzese also raced number 33
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