AJS S9 1931 500cc SV
Displacement (ccm): 500 ccm
Type of engine: single-cylinder, four stroke, side valve
Transmision: chain, three speed gearbox.
Suspension: parallelogram front forks, rigid rear.

The S9 was available in two versions, "Light" and "Heavy".
There are several differences between the two: rear chain size, gear ratios, wheel base and petrol and oil tank capacity. The engine is the same in both versions.

Courtesy Motos Antigua HD

AJS 1931 Models