1971 Trans-AMA motocross series
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The 1971 Trans-AMA motocross series was the second 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 Sylvain Geboers claimed the championship with three overall victories. German Maico rider, Adolf Weil scored two overall victories and claimed second place in the championship, with Swedish Husqvarna pilot Torlief Hansen taking third place. The Suzuki teammates of Joel Robert and Roger De Coster didn't join the event until the fifth race of the series, but made an impact with De Coster posting three overall victories with Robert adding one more. As a result of his being the highest placed American rider at fourteenth overall, Mark Blackwell, was crowned the American motocross national champion, clinching the title by one point over Brad Lackey.
| Round | Date | Location | Overall Winner | Top American | |||
|---|---|---|---|---|---|---|---|
| 1 | 19 September | Carlsbad Raceway |  Sylvain Geboers |
Brad Lackey | |||
| 2 | 26 September | Boise, Idaho | Sylvain Geboers |
Billy Clements | |||
| 3 | 3 October | Elkhorn, Wisconsin |  Adolf Weil |
Mark Blackwell | |||
| 4 | 10 October | New Berlin, New York | Adolf Weil |
Tore Jonsson | |||
| 5 | 24 October | Delta, Ohio |  Heikki Mikkola |
Tore Jonsson | |||
| 6 | 31 October | Orlando, Florida | Sylvain Geboers |
John DeSoto | |||
| 7 | 7 November | St. Peters, Missouri | Heikki Mikkola |
Brad Lackey | |||
| 8 | 14 November | Tulsa, Oklahoma | Roger De Coster |
Brad Lackey | |||
| 9 | 21 November | Puyallup, Washington | Joël Robert |
Mark Blackwell | |||
| 10 | 28 November | Livermore, California | Roger De Coster |
Mark Blackwell | |||
| 11 | 3 December | Irvine, California | Roger De Coster |
Mark Blackwell | |||
| Sources:[1][2][3] | |||||||
1971 Trans-AMA final standings
| Pos | Rider | Machine | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | Pts | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Sylvain Geboers |
Suzuki | 1 | 1 | 2 | 3 | 3 | 1 | 3 | 4 | 3 | 5 | 3 | 3,066 | |||||||||
| 2 | Adolf Weil |
Maico | 1 | 1 | 6 | 5 | 4 | 5 | 4 | 3 | 4 | 2,331 | |||||||||||
| 3 |  Torleif Hansen |
Husqvarna | 2 | 3 | 3 | 2 | 2 | 5 | 3 | 2,052 | |||||||||||||
| 4 | Roger De Coster |
Suzuki | 4 | 1 | 2 | 1 | 1 | 1,865 | |||||||||||||||
| 5 | Joël Robert |
Suzuki | 9 | 2 | 2 | 1 | 4 | 2 | 1,730 | ||||||||||||||
| 6 | Heikki Mikkola |
Husqvarna | 5 | 1 | 2 | 1 | 1,680 | ||||||||||||||||
| 7 | Willy Bauer |
Maico | 7 | 10 | 7 | 6 | 8 | 7 | 6 | 1,276 | |||||||||||||
| 8 | Gaston Rahier |
ČZ | 2 | 5 | 4 | 9 | 8 | 10 | 8 | 10 | 1,112 | ||||||||||||
| 9 |  Pierre Karsmakers |
Husqvarna | 6 | 8 | 3 | 7 | 6 | 6 | 7 | 1,110 | |||||||||||||
| 10 |  Dave Bickers |
ČZ | 3 | 5 | 6 | 7 | 10 | 5 | 1,076 | ||||||||||||||
| 11 | John Banks |
ČZ | 5 | 4 | 9 | 4 | 10 | 971 | |||||||||||||||
| 12 | Andy Roberton |
Husqvarna | 8 | 9 | 10 | 5 | 2 | 6 | 810 | ||||||||||||||
| 13 |  Vlastimil Válek |
ČZ | 7 | 6 | 8 | 6 | 709 | ||||||||||||||||
| 14 |  Mark Blackwell |
Husqvarna | 4 | 8 | 8 | 604 | |||||||||||||||||
| 15 | Brad Lackey |
ČZ | 4 | 8 | 9 | 603 | |||||||||||||||||
| 16 | Gary Jones |
Yamaha | 6 | 10 | 9 | 439 | |||||||||||||||||
| 17 | John DeSoto |
Suzuki | 9 | 9 | 10 | 9 | 425 | ||||||||||||||||
| 18 | Chris Horsefield |
ČZ | 7 | 9 | 416 | ||||||||||||||||||
| 19 | Uno Palm |
Husqvarna | 5 | 324 | |||||||||||||||||||
| 20 | Peter Lamppu |
Montesa | 10 | 10 | 309 | ||||||||||||||||||
| - | Tore Jonsson |
Maico | 8 | 7 | - | ||||||||||||||||||
| - | Billy Clements |
Husqvarna | 7 | 8 | - | ||||||||||||||||||
| - | Vic Eastwood |
AJS | 7 | - | |||||||||||||||||||
| - | Barry Higgins |
Maico | 9 | - | |||||||||||||||||||
| - | Bryan Kenney |
Husqvarna | 10 | - | |||||||||||||||||||
| Sources:[1][2][3] | |||||||||||||||||||||||