The 1993 United States motorcycle Grand Prix was the penultimate round of the 1993 Grand Prix motorcycle racing season. It took place on September 12, 1993, at Laguna Seca Raceway.

500 cc race report It came to be known that Wayne Rainey’s career had been over following his crash in the previous round. As a result, Kevin Schwantz had clinched the 1993 world championship by the end of this round as he finished fourth.

Kenny Roberts commented on Rainey’s retirement, "I’ve thought about it the last week, but Wayne wants to work in Grand Prix racing. That’s going to keep the edge sharp, because he wants to help the team, he wants to help riders, he wants to follow along in what I’ve done. And that’s going to keep me involved. Wayne’s a big, big part of my team, and if he was disgusted with the whole thing, then yeah, it’d probably take a lot of the edge off. And he doesn’t show any signs of that and that’s probably going to keep me involved, otherwise I ... well, you know, I can do anything I want to do, but he’s a driving force right now."Duke Video, “Bike 500 GP 1993 Review”. Videocassette.

Despite having recently been crowned the world champion, Schwantz was equally concerned about Rainey, remarking, "Everybody’s thinking about Wayne, and we all wish Wayne and Shae and Rex the best, but at the same time, I feel like we raced all season ... to put ourselves in a position to be there to take advantage of any opportunities, any doors that were open. I feel like we still earned it — we weren’t given it."

Rainey himself commended Schwantz on his championship title, saying, "Kevin called. I said to him: You deserve it. And hey, I made the mistake. It doesn’t take anything away from what you did to win your championship."Scott, Michael. Wayne Rainey: His Own Story. Page 190. Sparkford: Haynes Publishing, 1997.

John Kocinski took the start from Mick Doohan, Schwantz and Alex Barros.

Teammates Schwantz and Barros passed Kocinski.

Barros started to pull away, and at Turn 11, Kocinski tried an inside pass on Schwantz that failed to stick, allowing Doohan to come up as the three went down the straight three abreast. Schwantz stayed to the inside and took the hairpin ahead of Doohan and Kocinski.

Doohan got past Schwantz and hunted down Barros to take the lead. Kocinski also passed Barros.

Doohan's bike hopped a bit on the exit of The Corkscrew, causing him to lose his footing and almost ride his bike side-saddle, only to later clip the hay bales on the left side of the track with his shoulder. He was almost hit by two bikes as he slid into the track, but managed to get up with a bit of pain.

Kocinski's win was Cagiva’s first dry win in GP racing; Eddie Lawson won a wet race last year, but a lucky tire choice was seen as the main reason for the win.

500 cc classification Pos. Rider Team Manufacturer Time/Retired Points 1 John Kocinski Cagiva Team Agostini Cagiva 48:17.175 25 2 Alex Barros Lucky Strike Suzuki Suzuki +6.375 20 3 Luca Cadalora Marlboro Team Roberts Yamaha +10.489 16 4 Kevin Schwantz Lucky Strike Suzuki Suzuki +18.265 13 5 Daryl Beattie Rothmans Honda Team Honda +19.493 11 6 Shinichi Itoh HRC Rothmans Honda Honda +37.292 10 7 Àlex Crivillé Marlboro Honda Pons Honda +39.317 9 8 Niall Mackenzie Valvoline Team WCM ROC Yamaha +42.851 8 9 John Reynolds Padgett's Motorcycles Harris Yamaha +1 Lap 7 10 Juan Lopez Mella Lopez Mella Racing Team ROC Yamaha +1 Lap 6 11 José Kuhn Euromoto Yamaha +1 Lap 5 12 Jeremy McWilliams Millar Racing Yamaha +1 Lap 4 13 Sean Emmett Shell Team Harris Harris Yamaha +1 Lap 3 14 Serge David Team ROC ROC Yamaha +1 Lap 2 15 Laurent Naveau Euro Team ROC Yamaha +1 Lap 1 16 David Jefferies Peter Graves Racing Team Harris Yamaha +1 Lap 17 Tsutomu Udagawa Team Udagawa ROC Yamaha +1 Lap 18 Michael Rudroff Rallye Sport Harris Yamaha +1 Lap 19 Andreas Meklau Austrian Racing Company ROC Yamaha +1 Lap 20 Bruno Bonhuil MTD Objectif 500 ROC Yamaha +1 Lap Ret Matthew Mladin Cagiva Team Agostini Cagiva Retirement Ret Thierry Crine Ville de Paris ROC Yamaha Retirement Ret Renato Colleoni Team Elit ROC Yamaha Retirement Ret Kevin Mitchell MBM Racing Harris Yamaha Retirement Ret Cees Doorakkers Doorakkers Racing Harris Yamaha Retirement Ret Mick Doohan Rothmans Honda Team Honda Retirement Ret Andrew Stroud Team Harris Harris Yamaha Retirement Ret Marco Papa Librenti Corse Harris Yamaha Retirement Ret Lucio Pedercini Team Pedercini ROC Yamaha Retirement Ret Bernard Garcia Yamaha Motor France Yamaha Retirement Ret Danny Walker Southwest Motorsports Harris Yamaha Retirement Ret Doug Chandler Cagiva Team Agostini Cagiva Retirement DNS Freddie Spencer Yamaha Motor France Yamaha Did not start Sources:

250 cc classification Pos Rider Manufacturer Time/Retired Points 1 Loris Capirossi Honda 46:04.505 25 2 Doriano Romboni Honda +1.381 20 3 Loris Reggiani Aprilia +3.803 16 4 Alberto Puig Honda +3.881 13 5 Tetsuya Harada Yamaha +4.619 11 6 Pierfrancesco Chili Yamaha +12.279 10 7 Nobuatsu Aoki Honda +18.166 9 8 Helmut Bradl Honda +19.861 8 9 Tadayuki Okada Honda +28.044 7 10 Kenny Roberts Jr Yamaha +44.751 6 11 Luis d'Antin Honda +45.113 5 12 Juan Borja Honda +55.484 4 13 Frédéric Protat Aprilia +56.529 3 14 Carlos Checa Honda +57.555 2 15 Adrian Bosshard Honda +1:02.409 1 16 Patrick van den Goorbergh Aprilia +1:02.565 17 Pere Riba Honda +1:04.795 18 Bernard Haenggeli Aprilia +1:15.641 19 Luis Maurel Aprilia +1 Lap 20 Bernd Kassner Aprilia +1 Lap 21 Jean-Pierre Jeandat Aprilia +1 Lap 22 Massimo Pennachioli Honda +1 Lap Ret Max Biaggi Honda Retirement Ret Andy Preining Aprilia Retirement Ret Eskil Suter Aprilia Retirement Ret Simon Crafar Suzuki Retirement Ret Wilco Zeelenberg Aprilia Retirement Ret Jochen Schmid Yamaha Retirement Ret Jean-Philippe Ruggia Aprilia Retirement Ret Jean-Michel Bayle Aprilia Retirement Ret Volker Bahr Honda Retirement

Notes