Billy: You must be some important dude, man. Like, that treatment.
George Hanson: Dude? What does he mean, dude? Dude ranch?
Billy: Dude.
Captain America: Hell no. Dude means - nice guy, you know. Dude means: regular sort of person.
George Hanson: Well, you boys don't look like you're from this part of the country.
Deputy: Whatcha think we oughta do with them?
Cat Man: I don't never know. But I don't think they'll make the parish line.
Billy: Where ya from man?
Stranger on the Highway: Hard to say.
Billy: Hey, man! We've done it! We've done it! We're rich, Wyatt. Yeah, man. Yeah. Say, we did it, man. We did it! We did it. We're rich, man! We're retirin' in Florida now, mister.
Captain America: You know Billy, we blew it.
Captain America: Do this instead.
George Hanson: Oh, no thanks. I got some store bought right over here on my own.
Captain America: No, man. This is grass.
George Hanson: You mean marijuana?
Captain America: Yeah.
George Hanson: Lord have mercy, is that what that is?
George Hanson: They'll talk to ya and talk to ya and talk to ya about individual freedom. But they see a free individual, it's gonna scare 'em.
Captain America: No, I mean it, you've got a nice place. It's not every man that can live off the land, you know. You do your own thing in your own time. You should be proud.
Billy: That's what it's all about, man, I mean, like, you know. You go for the big money, man, and you're free! You dig?
Captain America: We blew it. Good night, man.
Answer: Hopper is riding something British, Triumph or BSA. Hard to tell them apart and both were real common at the time.