Ok here goes… I remember a movie we rented on video cassette in the early 80s, but not much, fragments really. It was a sort of Sci-fi/future/ post apocolyptic /similar to mad max ..setting with this tactical/military looking semi truck in it, this thing was like a mobile command post with men n weapons, turrets in the trailer with like military looking tactical electronic consoles etc and a connection between the cab and trailer.  I think they had other vehicles too I know the guys in it were the bad guys of the movie with a leader. I recall a (typical) sex scene ( no not xxx) with the star and a girl he meets which takes place in a barn in hay.  I think the star rode a motorcycle… Sorry so vague I was like 10, many moons ago…