| Attribute | AJS Model 20 500 1956 × | Kawasaki 500 H1 × |
|---|---|---|
| General | ||
| Production from (year) | 1956 | 1969 |
| Make | AJS | Kawasaki |
| Model | AJS Model 20 500 | Kawasaki 500 H1 |
| Category | Allround | Allround |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | In-line three, two-stroke |
| Fuel system | Carburettor | Carburettor. Mikuni 28mm |
| Displacement (cm³) | 498 | 498 |
| Power (kw) | 14.6 | - |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 66 | 60 |
| Stroke (mm) | 72.8 | 50 |
| Gearbox | 4-speed | 5-speed |
| Ignition | Magneto | - |
| Clutch | Wet multiplate | - |
| Compression | 7.0:1 | - |
| Chassis | ||
| Front suspension | Telescopic | - |
| Rear suspension | Twin shock | - |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Single disc |
| Frame type | Single cradle | - |
| Front tyre | 3.25-19 | 3.25-19 |
| Rear tyre | 3.25-19 | 4.-18 |
| Seat | Dual | - |
| Wheels | Spoked | - |
| Other | ||
| Starter | Kick | - |
| Dimensions | ||
| Dry weight (kg) | 178 | 174 |
| Power/weight ratio | 0.082 | - |
| Performance | ||
| Top speed (km/h) | 137 | 190 |
| Fuel capacity (l) | 13.5 | 15 |