Which year did Harley-Davidson finish first and third in the 250cc world championship? Water Villa and Franco Bonera were the riders.
Franco Bonera Gianfranco Bonera (born April 2, 1945, in Porpetto, Province of Udine) is an Italian former Grand Prix motorcycle road racer. His best year was in 1974 when he won the Nations Grand Prix and finished second to his MV Agusta teammate, Phil Read, in the 500cc world championship. He switched to the 250cc class in 1976, racing for the Harley-Davidson factory racing team on Aermacchi machines rebadged after being purchased by the American firm. He won the 250cc Spanish Grand Prix and finished the season in third place behind his Harley-Davidson teammate, Walter Villa and Yamaha's Takazumi Katayama.
Teuvo Länsivuori Teuvo Pentti "Tepi" Länsivuori (born 9 December 1945) is a former Grand Prix motorcycle road racer. He had his most successful years in 1973 when he finished in second place behind Giacomo Agostini in the 350cc World Championship, second in the 250 championship to Dieter Braun, and in 1976 when he finished second to his Suzuki team-mate Barry Sheene, in the 500cc world championship.