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.

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.

[1][2] Sep. 24, 1972, Copetown, Ontario Oct. 1, 1972, Linnville, Ohio Oct. 8, 1972, St. Peters, Missouri Oct. 15, 1972, Atlanta, Georgia Oct. 22, 1972, Orlando, Florida Oct. 29, 1972, Houston Texas Nov. 5, 1972, Carlsbad, California Nov. 12, 1972, Phoenix, Arizona Nov. 19, 1972, Puyallup, Washington Nov. 26, 1972, Livermore, California Dec. 3, 1972, Saddleback Park, California