1978 Yamaha SR 500 Bikes
The SR was styled by Atsushi Ishiyama with Yamaha presenting a pre-production prototype to US dealers in late 1975. Ishiyma said of the bike's styling: "Our choice was to design the new SR500 with a strong family image .
The Yamaha SR400 (1978-) and SR500 (1978-1999) are single-cylinder, air-cooled, two-passenger motorcycles manufactured in Japan by Yamaha Motor Company as a street version of the Yamaha XT500 — with a standard riding posture and styling resembling the Universal Japanese Motorcycles of the 1970s. The two models differ by their engines: the SR400 engine has a lower displacement, achieved with a different crankshaft and shorter piston stroke and both models feature only kickstarting, i.e., no electric starter.