250cc Grand Prix leading entries for 1993:
| no. | rider | entrant | bike |
| 3 | Pier-Francesco Chili ITA | Telkor-Yamaha Valesi Racing | Yamaha |
| 31 | Tetsuya Harada JAP | Telkor-Yamaha Valesi Racing | Yamaha |
| 4 | Helmut Bradl BRD | HB Honda Germany | Honda |
| 32 | Volker Bähr BRD | HB Honda Germany | Honda |
| 5 | Max Biaggi ITA | Rothmans Kanemoto Honda | Honda |
| 6 | Alberto Puig ESP | Ducados Honda Pons | Honda |
| 7 | Jochen Schmid BRD | JTR-Mitsui Yamaha Racing | Yamaha |
| 8 | Carlos Cardús ESP | Team Carlos Cardús Honda | Honda |
| 36 | Pere Riba Cabana ESP* | Team Carlos Cardús Honda | Honda |
| 10 | Doriano Romboni ITA | HB Racing Team Italy | Honda |
| 11 | Wilco Zeelenberg NED | Exact Software-DC Sports | Aprilia |
| 24 | Patrick van den Goorbergh NED | Exact Software-DC Sports | Aprilia |
| 12 | Gabriele Debbia ITA | Daytona-Pit Lane Racing | Honda |
| 35 | Loek Bodelier NED* | Daytona-Pit Lane Racing | Honda |
| 38 | Carlos Checa ESP* | Daytona-Pit Lane Racing | Honda |
| 13 | Loris Reggiani ITA | Aprilia Racing Team # | Aprilia |
| 17 | Jean-Philippe Ruggia FRA | Aprilia Racing Team # | Aprilia |
| 67 | Marcellino Lucchi ITA** | Aprilia Racing Team | Aprilia |
| 14 | Nobuatsu Aoki JAP | Kanemoto Racing ## | Honda |
| 15 | Nobuyuki Wakai JAP+ | Racing Supply ### | Suzuki |
| 16 | Andy Preining AUT | Team Preining | Aprilia |
| 18 | Tadayuki Okada JAP | HRC Rothmans Honda | Honda |
| 19 | John Kocinski USA | Team Lucky Strike Suzuki 250 | Suzuki |
| 37 | Simon Crafar NZL* | Team Lucky Strike Suzuki 250 | Suzuki |
| 74 | Jimmy Filice USA** | Team Lucky Strike Suzuki 250 | Suzuki |
| 20 | Eskil Suter SUI | Mohag Aprilia | Aprilia |
| 21 | Paolo Casoli ITA | Gilera Racing Team | Gilera |
| 39 | Alessandro Gramigni ITA | Gilera Racing Team | Gilera |
| 22 | Luis Maurel ESP | PR2-Ducados Aprilia | Aprilia |
| 23 | Bernard Hänggeli SUI | Marlboro Aprilia Suisse | Aprilia |
| 25 | Jürgen van den Goorbergh NED | Van den Goorbergh Racing | Aprilia |
| 26 | Bernd Kassner BRD | Rallye Sport Racing Team Munich | Aprilia |
| 27 | Frédéric Protat FRA | FP Racing | Aprilia |
| 51 | Jean-Pierre Jeandat FRA | FP Racing | Aprilia |
| 28 | Adrian Bosshard SUI | Honda Suisse Mühlebach | Honda |
| 30 | Juan Borja ESP | Team Aspar | Honda |
| 36 | Pere Riba Cabana ESP*** | Team Aspar | Honda |
| 45 | Jorge Martínez ESP*** | Team Aspar | Honda |
| 34 | Luís d’Antín ESP | S.S.P. Competicion | Honda |
| 43 | Massimo Pennacchioli ITA | P M Racing | Honda |
| 44 | Jean-Michel Bayle FRA | Chesterfield Team de Radiguès | Aprilia |
| 50 | Takuma Aoki JAP** | Cup Noodle Honda | Honda |
| 65 | Loris Capirossi ITA | Marlboro Team Pileri | Honda |
| 75 | Kenny Roberts Jr USA** | Team Roberts | Yamaha |
| 77 | Sete Gibernau ESP** | Marlboro Team Roberts | Yamaha |
* replacement rider
** wildcard rider at selected rounds
*** substitute rider
+ killed in a pit lane accident
# also Aprilia Unlimited Jeans; Chesterfield Aprilia Racing Team
## also Cup Noodle Kanemoto
### also Lucky Strike Keiyu Suzuki
With grateful thanks to Phil Wain of RealRoadRacing.com
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