That was back in the day when the manufacturers would take a street bike, slap a high pipe and a pair of "universal" tires on it, and call it a "scrambler". Remember the Honda CL72 250, the Yamaha Big Bear, the Norton P-11, the Triumph Desert Special, etc. etc? They all did it and it was more of a style thing than a real dirt machine.
Then Bultaco hit the market with their Sherpas, Pursangs and Bandidos that had serious long travel (for the era, anyway) suspension, light weight 2 stroke power, and minimal fiberglass body work. Bultaco ruled the dirt for about a decade before everyone else caught up. I worked at a Bultaco shop at the time and we couldn't get them out of the crate and out the door fast enough. For a number of years, if you wanted to win on dirt, you had to ride a 'taco. The Japanese eventually figured it out, beat them at their own game, and Bultaco faded by the early 1980s.