Comparison of DKW SB 500 1939 and Norton 490 CS 1 1930 [S]ave
| Attribute |  DKW SB 500 1939 × |  Norton 490 CS 1 1930 × |
|---|---|---|
| General | ||
| Production from (year) | 1939 | 1930 |
| Make | DKW | Norton |
| Model | DKW SB 500 | Norton 490 CS 1 |
| Category | Allround | Allround |
| Engine and transmission | ||
| Engine type | Twin, two-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor. Amal | Carburettor |
| Displacement (cm³) | 493.9 | 490 |
| Power (kw) | 10.9 | - |
| Cooling system | Air | - |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 68 | - |
| Stroke (mm) | 68 | - |
| Fuel control | - | Single Overhead Cams (SOHC) |
| Compression | 5.7:1 | - |
| Chassis | ||
| Rear suspension | Rigid | - |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Front tyre | 3.5-19 | - |
| Rear tyre | 3.5-19 | - |
| Seat | - | Solo seat with springs |
| Wheels | - | Spoked |
| Dimensions | ||
| Dry weight (kg) | 165 | 145 |
| Power/weight ratio | 0.0661 | - |
| Performance | ||
| Top speed (km/h) | 115 | 128 |
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