1972 Trans-AMA motocross series
The 1972 Trans-AMA motocross series was the third 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.
Swedish Maico factory rider Åke Jonsson dominated the championship, winning nine consecutive overall wins. 500cc world champion, Roger De Coster and Heikki Mikkola placed second and third overall, claiming one victory apiece to start off the series before Jonsson began his winning streak. Brad Lackey was the highest-placing American rider, finishing the series sixth overall.1972 Trans-AMA final standings
| Place | Rider | Country | Team | Points | Wins |
| 1 |  Åke Jonsson | Sweden | Maico | 1550 | 9 |
| 2 |  Roger De Coster | Belgium | Suzuki | 912 | 1 |
| 3 |  Heikki Mikkola | Finland | Husqvarna | 811 | 1 |
| 4 |  Hans Maisch | West Germany | Maico | 530 | 0 |
| 5 | Arne Kring | Sweden | Husqvarna | 487 | 0 |
| 6 |  Brad Lackey | United States | Kawasaki | 460 | 0 |
| 7 | Bengt Åberg | Sweden | Husqvarna | 304 | 0 |
| 8 |  Pierre Karsmakers | Netherlands | Husqvarna | 303 | 0 |
| 7 | Christer Hammargren | Sweden | Yamaha | 264 | 0 |
| 10 |  Miroslav Halm | Czechoslovakia | ČZ | 228 | 0 |
1972 Trans-AMA Round 1
Sep. 24, 1972, Copetown, Ontario
| Place | Rider | Country | Team |
| 1 | Roger De Coster | Belgium | Suzuki |
| 2 | Åke Jonsson | Sweden | Maico |
| 3 | Heikki Mikkola | Finland | Husqvarna |
| 4 | Brad Lackey | United States | Kawasaki |
| 5 |  Mike Runyard | United States | ČZ |
| 6 | Gary Chaplin | United States | Maico |
| 7 |  Serge Bacou | France | Bultaco |
| 8 | Rich Thorwaldson | United States | Suzuki |
| 9 | Billy Clements | United States | Husqvarna |
| 10 | Seppo Makinen | Finland | Husqvarna |
1972 Trans-AMA Round 2
Oct. 1, 1972, Linnville, Ohio
| Place | Rider | Country | Team |
| 1 | Heikki Mikkola | Finland | Husqvarna |
| 2 | Hans Maisch | West Germany | Maico |
| 3 | Roger De Coster | Belgium | Suzuki |
| 4 | Åke Jonsson | Sweden | Maico |
| 5 | Serge Bacou | France | Bultaco |
| 6 | Bryan Kenney | United States | Maico |
| 7 |  Dave Bickers | United Kingdom | ČZ |
| 8 | Wyman Priddy | United States | ČZ |
| 9 | Jim Pomeroy | United States | Bultaco |
| 10 | Brad Lackey | United States | Kawasaki |
1972 Trans-AMA Round 3
Oct. 8, 1972, St. Peters, Missouri
| Place | Rider | Country | Team |
| 1 | Åke Jonsson | Sweden | Maico |
| 2 | Heikki Mikkola | Finland | Husqvarna |
| 3 | Hans Maisch | West Germany | Maico |
| 4 | Arne Kring | Sweden | Husqvarna |
| 5 | Pierre Karsmakers | Netherlands | Husqvarna |
| 6 | Brad Lackey | United States | Kawasaki |
| 7 | Gary Jones | United States | Yamaha |
| 8 | Rich Thorwaldson | United States | Suzuki |
| 9 | Dave Bickers | United Kingdom | ČZ |
| 10 | Wyman Priddy | United States | ČZ |
1972 Trans-AMA Round 4
Oct. 15, 1972, Atlanta, Georgia
| Place | Rider | Country | Team |
| 1 | Åke Jonsson | Sweden | Maico |
| 2 | Roger De Coster | Belgium | Suzuki |
| 3 | Jimmy Weinert | United States | Yamaha |
| 4 | Rich Thorwaldson | United States | Suzuki |
| 5 | Jim Pomeroy | United States | Bultaco |
| 6 | Bryan Kenney | United States | Maico |
| 7 | Arne Kring | Sweden | Husqvarna |
| 8 | Mike Runyard | United States | ČZ |
| 9 | Brad Lackey | United States | Kawasaki |
| 10 | Pierre Karsmakers | Netherlands | Husqvarna |
1972 Trans-AMA Round 5
Oct. 22, 1972, Orlando, Florida
| Place | Rider | Country | Team |
| 1 | Åke Jonsson | Sweden | Maico |
| 2 | Heikki Mikkola | Finland | Husqvarna |
| 3 | Arne Kring | Sweden | Husqvarna |
| 4 | Pierre Karsmakers | Netherlands | Husqvarna |
| 5 | Bengt Åberg | Sweden | Husqvarna |
| 6 | Brad Lackey | United States | Kawasaki |
| 7 | Jimmy Weinert | United States | Yamaha |
| 8 | Hans Maisch | West Germany | Maico |
| 9 | Serge Bacou | France | Bultaco |
| 10 | Jim Pomeroy | United States | Bultaco |
1972 Trans-AMA Round 6
Oct. 29, 1972, Houston Texas
| Place | Rider | Country | Team |
| 1 | Åke Jonsson | Sweden | Maico |
| 2 | Christer Hammargren | Sweden | Yamaha |
| 3 | Heikki Mikkola | Finland | Husqvarna |
| 4 | Arne Kring | Sweden | Husqvarna |
| 5 | Pierre Karsmakers | Netherlands | Husqvarna |
| 6 | Jaak van Velthoven | Belgium | Yamaha |
| 7 | Serge Bacou | France | Bultaco |
| 8 | Brad Lackey | United States | Kawasaki |
| 9 | Jiri Churavy | Czechoslovakia | ČZ |
| 10 | Mark Blackwell | United States | Husqvarna |
1972 Trans-AMA Round 7
Nov. 5, 1972, Carlsbad, California
| Place | Rider | Country | Team |
| 1 | Åke Jonsson | Sweden | Maico |
| 2 | Roger De Coster | Belgium | Suzuki |
| 3 | Heikki Mikkola | Finland | Husqvarna |
| 4 | Hans Maisch | West Germany | Maico |
| 5 | Miroslav Halm | Czechoslovakia | ČZ |
| 6 | Brad Lackey | United States | Kawasaki |
| 7 | Pierre Karsmakers | Netherlands | Husqvarna |
| 8 | Jaak van Velthoven | Belgium | Yamaha |
| 9 | Christer Hammargren | Sweden | Yamaha |
| 10 | Gary Jones | United States | Yamaha |
1972 Trans-AMA Round 8
Nov. 12, 1972, Phoenix, Arizona
| Place | Rider | Country | Team |
| 1 | Åke Jonsson | Sweden | Maico |
| 2 | Heikki Mikkola | Finland | Husqvarna |
| 3 | Roger De Coster | Belgium | Suzuki |
| 4 | Jaak van Velthoven | Belgium | Yamaha |
| 5 | Arne Kring | Sweden | Husqvarna |
| 6 | Christer Hammargren | Sweden | Yamaha |
| 7 | Brad Lackey | United States | Kawasaki |
| 8 | Hans Maisch | West Germany | Maico |
| 9 | Andy Roberton | United Kingdom | Husqvarna |
| 10 | Pierre Karsmakers | Netherlands | Husqvarna |
1972 Trans-AMA Round 9
Nov. 19, 1972, Puyallup, Washington
| Place | Rider | Country | Team |
| 1 | Åke Jonsson | Sweden | Maico |
| 2 | Arne Kring | Sweden | Husqvarna |
| 3 | Roger De Coster | Belgium | Suzuki |
| 4 | Bengt Åberg | Sweden | Husqvarna |
| 5 | Hans Maisch | West Germany | Maico |
| 6 | Andy Roberton | United Kingdom | Husqvarna |
| 7 | Christer Hammargren | Sweden | Yamaha |
| 8 | Brad Lackey | United States | Kawasaki |
| 9 | Miroslav Halm | Czechoslovakia | ČZ |
| 10 | Jim Pomeroy | United States | Bultaco |
1972 Trans-AMA Round 10
Nov. 26, 1972, Livermore, California
| Place | Rider | Country | Team |
| 1 | Åke Jonsson | Sweden | Maico |
| 2 | Roger De Coster | Belgium | Suzuki |
| 3 | Miroslav Halm | Czechoslovakia | ČZ |
| 4 | Brad Lackey | United States | Kawasaki |
| 5 | Jiri Churavy | Czechoslovakia | ČZ |
| 6 | Jaak van Velthoven | Belgium | Yamaha |
| 7 | Bengt Åberg | Sweden | Husqvarna |
| 8 | Marty Tripes | United States | ČZ |
| 9 | Gary Jones | United States | Yamaha |
| 10 |  Masaharu Takezawa | Japan | Kawasaki |
1972 Trans-AMA Round 11
Dec. 3, 1972, Saddleback Park, California
| Place | Rider | Country | Team |
| 1 | Åke Jonsson | Sweden | Maico |
| 2 | Bengt Åberg | Sweden | Husqvarna |
| 3 | Hans Maisch | West Germany | Maico |
| 4 | Roger De Coster | Belgium | Suzuki |
| 5 | Andy Roberton | United Kingdom | Husqvarna |
| 6 | Marty Tripes | United States | ČZ |
| 7 | Miroslav Halm | Czechoslovakia | ČZ |
| 8 | Christer Hammargren | Sweden | Yamaha |
| 9 | Brad Lackey | United States | Kawasaki |
| 10 | Pierre Karsmakers | Netherlands | Husqvarna |
