The first automobile engine from Mazda was the 356cc air-cooled 90° V-twin. It was an OHV 4-valve pushrod design. This engine produced 16PS (12kW) and 16lb⋅ft (22N⋅m) in the 1960 Mazda R360.
EB (577cc)
The engine was enlarged to 577cc for the 1961 B600, which was built until 1966.[1] It produces 20PS (15kW) at 4300rpm and 3.8kg⋅m (37N⋅m; 27lb⋅ft) of torque at 3000rpm. This engine is popular with custom motorcycle builders in Indonesia, who use it in a variety of frames to emulate the V-twin engined Harley-Davidsons.