In 1977 new breed 30 Series launches, including models 530, 533, 630, 631 and 632 with gas and diesel, air- and liquid-cooled engines. A major product feature is its center-mounted chaincase with drive chains in a “bowtie” configuration, which eliminates adjustments, a highly touted competitive advantage. Models 730, 731, 732 arrive the next year.
WheelsAge.org '2005–н.ч.