The 1974 Trans-AMA motocross series was the fifth annual international series established by the American Motorcyclist Association as a pilot event to help establish motocross in the United States. The motocross series was an invitational based on a 500cc engine displacement formula, run on American tracks featuring the top riders from the F.I.M. world championship against the top American riders.
Suzuki factory rider Roger De Coster claimed the championship with four overall victories. His Suzuki teammate, Dutchman Gerrit Wolsink took second place along with one overall victory. Maico factory rider Adolf Weil claimed third place, while the top American rider was Bultaco's Jim Pomeroy in fourth place.
1974 Trans-AMA final standings
| Place | Rider | Country | Team | Points | Wins |
|---|---|---|---|---|---|
| 1 | .svg.png.webp){kind=small} Roger De Coster |
Belgium | Suzuki | 900 | 4 |
| 2 |  Gerrit Wolsink |
Netherlands | Suzuki | 530 | 1 |
| 3 |  Adolf Weil |
Germany | Maico | 415 | 0 |
| 4 |  Jim Pomeroy |
United States | Bultaco | 399 | 0 |
| 5 | Harry Everts |
Belgium | Puch | 344 | 1 |
| 6 | Willy Bauer |
Germany | Maico | 333 | 0 |
| 7 |  Yukio Sugio |
Japan | Yamaha | 288 | 0 |
| 8 | Brad Lackey |
United States | Husqvarna | 285 | 0 |
| 9 |  Arne Kring |
Sweden | Husqvarna | 270 | 0 |
| 10 | Pierre Karsmakers |
Netherlands | Yamaha | 233 | 1 |
1974 Trans-AMA Round 1
Oct. 6, 1974, Unadilla, New York
| Place | Rider | Country | Team |
|---|---|---|---|
| 1 | Roger De Coster |
Belgium | Suzuki |
1974 Trans-AMA Round 2
Oct. 13, 1974, Linnville, Ohio
| Place | Rider | Country | Team |
|---|---|---|---|
| 1 |  Heikki Mikkola |
Finland | Husqvarna |
1974 Trans-AMA Round 3
Oct. 20, 1974, Gainesville, Georgia
| Place | Rider | Country | Team |
|---|---|---|---|
| 1 | Roger De Coster |
Belgium | Suzuki |
| 2 | Adolf Weil |
Germany | Maico |
| 3 | Jim Pomeroy |
United States | Bultaco |
| 4 | Willy Bauer |
Germany | Maico |
| 5 | Bengt Åberg |
Sweden | Husqvarna |
| 6 | Hans Maisch |
Germany | Maico |
| 7 | Brad Lackey |
United States | Husqvarna |
| 8 | Tony DiStefano |
United States | ČZ |
| 9 | Harry Everts |
Belgium | Puch |
| 10 | Jimmy Weinert |
United States | Kawasaki |
1974 Trans-AMA Round 4
Oct. 27, 1974, Orlando, Florida
| Place | Rider | Country | Team |
|---|---|---|---|
| 1 | Gerrit Wolsink |
Netherlands | Suzuki |
| 2 | Arne Kring |
Sweden | Husqvarna |
| 3 | Yukio Sugio |
Japan | Yamaha |
| 4 | Brad Lackey |
United States | Husqvarna |
| 5 | Rich Eirstedt |
United States | Honda |
| 6 | Harry Everts |
Belgium | Puch |
| 7 | Håkan Andersson |
Sweden | Yamaha |
| 8 | Adolf Weil |
Germany | Maico |
| 9 | Willy Bauer |
Germany | Maico |
| 10 | Mike Runyard |
United States | Suzuki |
1974 Trans-AMA Round 5
Nov. 10, 1974, Whitney, Texas
| Place | Rider | Country | Team |
|---|---|---|---|
| 1 | Roger De Coster |
Belgium | Suzuki |
| 2 | Harry Everts |
Belgium | Puch |
| 3 | Steve Stackable |
United States | Maico |
| 4 | Arne Kring |
Sweden | Husqvarna |
| 5 | Adolf Weil |
Germany | Maico |
| 6 | Yukio Sugio |
Japan | Yamaha |
| 7 | Pierre Karsmakers |
Netherlands | Yamaha |
| 8 | Rich Thorwaldson |
United States | Suzuki |
| 9 | Håkan Andersson |
Sweden | Yamaha |
| 10 | Brad Lackey |
United States | Husqvarna |
1974 Trans-AMA Round 6
Nov. 17, 1974, Puyallup, Washington
| Place | Rider | Country | Team |
|---|---|---|---|
| 1 | Harry Everts |
Belgium | Puch |
| 2 | Roger De Coster |
Belgium | Suzuki |
| 3 | Yukio Sugio |
Japan | Yamaha |
| 4 | Rich Thorwaldson |
United States | Suzuki |
| 5 | Mike Hartwig |
United States | Husqvarna |
| 6 |  Vic Eastwood |
United Kingdom | CCM |
| 7 | Mike Runyard |
United States | Suzuki |
| 8 | Arne Kring |
Sweden | Husqvarna |
| 9 | Gary Chapin |
United States | Maico |
| 10 | Sonny DeFeo |
United States | Maico |
1974 Trans-AMA Round 7
Nov. 24, 1974, Livermore, California
| Place | Rider | Country | Team |
|---|---|---|---|
| 1 | Roger De Coster |
Belgium | Suzuki |
| 2 | Willy Bauer |
Germany | Maico |
| 3 | Adolf Weil |
Germany | Maico |
| 4 | Mike Runyard |
United States | Suzuki |
| 5 | Gerrit Wolsink |
Netherlands | Suzuki |
| 6 | Raymond Boven |
Belgium | Montesa |
| 7 | Arne Kring |
Sweden | Husqvarna |
| 8 |  Vic Allan |
Scotland | Bultaco |
| 9 | Rich Thorwaldson |
United States | Suzuki |
| 10 | Rich Eirstedt |
United States | Honda |
1974 Trans-AMA Round 8
Dec. 1, 1974, Saddleback, California
| Place | Rider | Country | Team |
|---|---|---|---|
| 1 | Pierre Karsmakers |
Netherlands | Yamaha |
| 2 | Roger De Coster |
Belgium | Suzuki |
| 3 | Jim Pomeroy |
United States | Bultaco |
| 4 | Gerrit Wolsink |
Netherlands | Suzuki |
| 5 | Willy Bauer |
Germany | Maico |
| 6 | Adolf Weil |
Germany | Maico |
| 7 | Rich Thorwaldson |
United States | Suzuki |
| 8 | Hans Maisch |
Germany | Maico |
| 9 | Gary Jones |
United States | Can-Am |
| 10 | Vic Allan |
Scotland | Bultaco |