| 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 |
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| Displacement | 646.0 ccm (39.42 cubic inches) |
| Power | 31.4 HP (22.9 kW) @ 6000 RPM |
| Clutch | Wet multiplate |
| Frame, dampers, brakes and wheels |
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| Frame | Doble cradle |
| Front dampers | Hydraulic telescopic |
| Rear dampers | Twin shock Girling |
| Front brakes | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) |
| Wheels | Spoked |
| Weight and dimentions |
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| Dry weight | 176.0 kg (388.0 pounds) |
| Fuel tank | 16.0 litres (4.23 US gallons) |
| Other information |
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The AJS Model 31 model variants with detailed specs:
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