Comparison of AJS Model 31 650 Swift 1960 and AJS Model 31 650 Swift 1959 [S]ave
| Attribute |  AJS Model 31 650 Swift 1960 × |  AJS Model 31 650 Swift 1959 × |
|---|---|---|
| General | ||
| Production from (year) | 1960 | 1959 |
| Make | AJS | AJS |
| Model | AJS Model 31 650 Swift | AJS Model 31 650 Swift |
| Category | Allround | Allround |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Twin, four-stroke |
| Fuel system | Carburettor | Carburettor |
| Displacement (cm³) | 646 | 646 |
| Power (kw) | 22.9 | 22.9 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 72 | 72 |
| Stroke (mm) | 79.3 | 79.3 |
| Gearbox | 4-speed | 4-speed |
| Fuel control | Overhead Valves (OHV) | Overhead Valves (OHV) |
| Ignition | Bobine | Bobine |
| Clutch | Wet multiplate | Wet multiplate |
| Compression | 7.5:1 | 7.5:1 |
| Chassis | ||
| Front suspension | Hydraulic telescopic | Hydraulic telescopic |
| Rear suspension | Twin shock Girling | Twin shock Girling |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Frame type | Doble cradle | Doble cradle |
| Front tyre | 3.25-19 | 3.25-19 |
| Rear tyre | 3.25-19 | 3.25-19 |
| Seat | Dual | Dual |
| Wheels | Spoked | Spoked |
| Other | ||
| Starter | Kick | Kick |
| Dimensions | ||
| Dry weight (kg) | 176 | 176 |
| Power/weight ratio | 0.1301 | 0.1301 |
| Performance | ||
| Fuel capacity (l) | 16 | 16 |
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