Honda introduced a liquid-cooled, shaft drive flat-four on a production motorcycle in 1975 on the Honda GL1000 Gold Wing From 1938 to 1939 Zündapp produced the shaft drive K800 opposed-four in Germany In 1955, in Britain, Wooler produced a small number of 500 cc flat-fours with shaft drive The BFG-Citroën (French) of 1982 was powered by a flat-four, 1,299 cc Citroën automobile engine and shaft drive. About 450 of them were built in 1981 and 1982. One-quarter of these were purchased by the French police.[9][10]