Cash takes off his jacket and shirt for the fight. After the fight, he and Wolf leave, Cash has neither jacket nor shirt, but in the next shot, they are riding and he has his shirt and jacket again.
Jason Momoa's companion says that he used to ride a '48 Knucklehead. The last year of production of the engine known as the Knucklehead was 1947.
What he said was: "'47 Knucklehead on a '48 frame".
What he said was: "'47 Knucklehead on a '48 frame".