Comparison of Norton International Model 30 1951 and Norton International Model 30 1950 [S]ave
| Attribute |  Norton International Model 30 1951 × | Norton International Model 30 1950 × |
|---|---|---|
| General | ||
| Production from (year) | 1951 | 1950 |
| Make | Norton | Norton |
| Model | Norton International Model 30 | Norton International Model 30 |
| Category | Sport | Sport |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor. Amal | Carburettor. Amal |
| Displacement (cm³) | 490 | 490 |
| Power (kw) | 21.5 | 21.5 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 79 | 79 |
| Stroke (mm) | 100 | 100 |
| Fuel control | Overhead Cams (OHC) | Overhead Cams (OHC) |
| Compression | 7.2:1 | 7.2:1 |
| Chassis | ||
| Front suspension | Telescopic | Telescopic |
| Rear suspension | Plungers | Plungers |
| Frame type | Cradle | Cradle |
| Front tyre | 3-21 | 3-21 |
| Rear tyre | 3.50-20 | 3.50-20 |
| Seat | Single spring-mounted | Single spring-mounted |
| Wheels | Spoked | Spoked |
| Other | ||
| Starter | Kick | Kick |
| Dimensions | ||
| Wheelbase (mm) | 1,391 | 1,391 |
| Dry weight (kg) | 176 | 176 |
| Power/weight ratio | 0.1222 | 0.1222 |
| Performance | ||
| Top speed (km/h) | 150 | 150 |
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