Little Fauss and Big Halsy

Here’s a sleeper motorcycle buddy movie starring Robert Redford and filmed in part near Phoenix, Arizona. Little Fauss, an amateur motorcycle racer (played by Michael J. Pollard), hangs out with Halsy Knox (Redford), a professional motorcycle racer.
Halsy, who was barred from the race tracks for drinking before racing, forms a dysfunctional partnership to allow Halsy to race under Fauss’s name, while Fauss served as his mechanic.
Their partnership is broken when wealthy society dropout Rita Nebraska (Lauren Hutton), attends a race and hooks-up with Halsy.
At the end of the movie, the men race against each other at Sears Point International Raceway. Halsy’s motorcycle breaks down, and leaves the track, hearing the announcement that Fauss has won the race.