1973 AMA Motocross National Championship season

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The 1973 AMA Motocross Championship season was the 2nd AMA Motocross National Championship season.

Contents

Summary

The sport of motocross experienced explosive growth in 1973 and motorcycle manufacturers sought to capitalize on the expanding market with all four Japanese manufacturers fielding factory-backed teams alongside their European counterparts. [1] Pierre Karsmakers from the Netherlands dominated the 1973 500cc national championship, winning seven of 12 AMA Nationals and claimed 17 victories in 36 races overall. [1] [2] Karsmakers is credited with helping raise the level of American motocross by stressing the importance of physical fitness and machine preparation. [2] 1973 marked a turning point in American motocross when Jimmy Weinert became the first American rider to defeat the then-dominant European riders in the Trans-AMA Motocross Series at Rio Bravo MX Park in Houston Texas. [1] [3] His victory showed that the level of American motocross had begun to compare with the level of European motocross. [3]

As in the 1973 season, after the season-ending 500cc race on September 9, American riders competing for the AMA national championship continued to accumulate points counting towards the national championship while they competed in the 1973 Trans-AMA motocross series, which began on September 23 and hosted visiting European riders from the Motocross World Championship. [1] Although Karsmakers was a Dutch citizen, he was competing under an AMA license so, he was listed as the "Top American" finisher in the Trans-AMA series.

After winning the 1972 250cc national championship on a Yamaha, Gary Jones was hired by Honda to help develop their new Honda CR250M motocross bike for the 1973 season. [1] [4] He did so successfully to win his second consecutive 250cc national title. [1]

Nationals

500cc

RoundDateLocationWinnerTeamReport
1March 10 Daytona International Speedway Flag of the Netherlands.svg Pierre Karsmakers Yamaha Report
2May 6 Opelousas, Louisiana Flag of the United States.svg Mike Hartwig Husqvarna Report
3May 13 Hialeah, Florida Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
4May 20Olive Branch, Michigan Flag of the United States.svg Mike Runyard Suzuki Report
5June 2 Atlanta, Georgia Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
6June 10 Adelphi, Ohio Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
7June 17 Lake Whitney Ranch, Texas Flag of the United States.svg Brad Lackey Kawasaki Report
8August 12 Lake Whitney Ranch, Texas Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
9August 18 Pocono, Pennsylvania Flag of the United States.svg Mike RunyardSuzuki Report
10August 26Sligo, Kentucky Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
11September 1 Alabama International Motor Speedway Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
12September 9 New Orleans, Louisiana Flag of the United States.svg Brad LackeyKawasaki Report

Trans-AMA Series

RoundDateLocationTop AmericanTeamReport
13September 23 Springville, New York Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
14September 28 Philadelphia, Pennsylvania Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
15October 7 Lexington, Ohio Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
16October 14 Washington, Indiana Flag of the United States.svg Jimmy Weinert Kawasaki Report
17October 21 Atlanta, Georgia Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
18October 28 Orlando, Florida Flag of the United States.svg Brad LackeyKawasaki Report
19November 4 Houston, Texas Flag of the United States.svg Jimmy WeinertKawasaki Report
20November 11 Phoenix, Arizona Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
21November 18 Puyallup, Washington Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
22November 25 Livermore, California Flag of the United States.svg Rich ThorwaldsonSuzuki Report
23December 2 Orange, California Flag of the Netherlands.svg Pierre KarsmakersYamaha Report

[5] [6]

250cc

RoundDateLocationWinnerTeamReport
1March 10 Daytona International Speedway Flag of the United States.svg Bob Grossi Husqvarna Report
2May 6 Opelousas, Louisiana Flag of the United States.svg Jimmy Weinert Kawasaki Report
3May 13 Hialeah, Florida Flag of the United States.svg Gary Jones Honda Report
4May 20Olive Branch, Michigan Flag of the United States.svg Jimmy WeinertKawasaki Report
5June 2 Atlanta, Georgia Flag of the United States.svg Marty Tripes Honda Report
6June 10 Adelphi, Ohio Flag of the United States.svg Gary JonesHonda Report
7June 17 Lake Whitney Ranch, Texas Flag of the United States.svg Gary JonesHonda Report
8July 1 Tooele, Utah Flag of the Netherlands.svg Pierre Karsmakers Yamaha Report
9July 6 Los Angeles Memorial Coliseum Flag of the United States.svg Marty TripesHonda Report
10July 15 Baldwin, Kansas Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
11July 22 Delta, Ohio Flag of the United States.svg John DeSoto ČZ Report
12July 29 Unadilla, New York Flag of the Netherlands.svg Pierre KarsmakersYamaha Report
13August 12 Lake Whitney Ranch, Texas Flag of the United States.svg Tim HartYamaha Report
14August 18 Pocono, Pennsylvania Flag of the United States.svg Rich ThorwaldsonSuzuki Report
15August 26Sligo, Kentucky Flag of the United States.svg Gary JonesHonda Report
16September 1 Alabama International Motor Speedway Flag of the United States.svg Gary JonesHonda Report
17September 9 New Orleans, Louisiana Flag of the United States.svg Gary JonesHonda Report

[5]

Final standings

References

  1. 1 2 3 4 5 6 "1973 Motocross Season". racerxonline.com. Retrieved November 28, 2018.
  2. 1 2 "Pierre Karsmakers at the Motorcycle Hall of Fame". motorcyclemuseum.org. Retrieved November 28, 2018.
  3. 1 2 "Jimmy Weinert at the Motorcycle Hall of Fame". motorcyclemuseum.org. Retrieved November 28, 2018.
  4. "Gary Jones at the AMA Motorcycle Hall of Fame". motorcyclemuseum.org. Retrieved November 28, 2018.
  5. 1 2 "1973 AMA Motocross National Championship results". racerxonline.com. Retrieved November 27, 2018.
  6. Assoc, American Motorcyclist (February 1982). "Trans-AMA Motocross Records" . Retrieved November 28, 2018.
  7. 1 2 "1973 AMA Motocross National Championship overall standings". racerxonline.com. Retrieved February 15, 2016.