AJS Model 31 No rating yet. 8 AJS Model 31 model variants.

AJS Model 31 model overview

AJS Model 31 models include the 8 motorcycles below produced from 1959 to 1966. The 1966 AJS Model 31 650 Swift motorcycle is used as an example on this page. It has a 646 ccm twin engine. The category is allround.

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Engine and transmission
Displacement	646.0 ccm (39.42 cubic inches)
Power	31.4 HP (22.9 kW) @ 6000 RPM