The Hard Ride (1971) | ACTION | FULL MOVIE

While in Vietnam, a GI promises his dying buddy that he'll take care of his motorcycle, "Baby", when he gets back home. After his discharge, he meets up with his dead friend's girlfriend, gets the bike, and then runs into trouble from some other bikers who don't like the idea of his having the motorcycle or the girl.

IMDb: https://www.imdb.com/title/tt0065815