03 — 1970s
The MachineArrives
Large multi-cylinder machines and potent two-strokes established Japanese big bikes on the world's roads.
Machines placed by verified production start year
YAMAHA
Yamaha XS-1
1970
Standard
Yamaha's first model with a four-stroke engine, after making only two-stroke machines since 1955. A slim 653 cm³ OHC vertical twin in an equally slim double-cradle frame answered the brief for a light, slim and compact large-displacement sports bike. Fans nicknamed it "Peke-S".

SUZUKI
Suzuki GT750
1971
Standard
Suzuki’s first 750, introduced in September 1971 as the flagship of the GT series. Its 738 cc liquid-cooled two-stroke inline triple used a pressurised system with an aluminium radiator and electric fan, and in the United States the model became known as the “Water Buffalo”.
YAMAHA
Yamaha YZ250
1974
Motocross
A production replica of the YZM250 (0W12) works machine that won the 1973 Motocross World Championship and All Japan Motocross Championship titles. It was the first production model with Monocross suspension, hence the name YZ250M. A competition-only machine with an air-cooled 246 cm³ two-stroke single and a 5-speed gearbox.

SUZUKI
Suzuki RG500 Grand Prix racer
1974
Race Machine
A road-racing machine developed by Suzuki for the 500 cc Grand Prix world championship. It used the square-four two-stroke layout proven in Suzuki’s 1960s Grand Prix programme and was designed by Makoto Hase. It finished second on its debut at the 1974 French Grand Prix and took its first win at the 1975 Dutch TT.

YAMAHA
Yamaha SR400
1978
Standard
Since its debut in March 1978, the SR400 held its following with a simple, largely unchanged style and the pulse of its kick-started, air-cooled single. For the Japanese market the line concluded with the Final Edition Limited of 2021. Specifications listed are those of the 2021 Final Edition Limited.