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.
Suzuki RG 500 gamma Suzuki RG 500 gamma was a racing motorcycle built by Suzuki which participated in the 500cc Grand Prix world championship. The bike debuted in 1981 replacing the Suzuki RG 500. The Roberto Gallina-Suzuki team won two consecutive riders world championships in the 500cc class with Marco Lucchinelli in 1981 and Franco Uncini in 1982.