In 1965 to 67 my race a triumph 650, it was a road bike and made into a scrambler thats how it was when it all started, Its the true era of scrambling. then they got the idea to make light weight scrambler, factory bikes got real light and production bike are still heavy in today standard. Greeves where the first to lighten up bike, bantam where road bikes and raced on dirt. then the spanish started with the N model which was a roady or trail, followed by the sherpa S Models, Montesa where go kart engine.