Comparison of BSA Y13 1938 and BSA Y13 1937 [S]ave
| Attribute |  BSA Y13 1938 × | BSA Y13 1937 × |
|---|---|---|
| General | ||
| Production from (year) | 1938 | 1937 |
| Make | BSA | BSA |
| Model | BSA Y13 | BSA Y13 |
| Category | Cross / motocross | Cross / motocross |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Twin, four-stroke |
| Fuel system | Carburettor. Amal monoblock | Carburettor. Amal monoblock |
| Displacement (cm³) | 748 | 748 |
| Power (kw) | 14.2 | 14.2 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 71 | 71 |
| Stroke (mm) | 94 | 94 |
| Fuel control | Overhead Valves (OHV) | Overhead Valves (OHV) |
| Ignition | Lucas | Lucas |
| Clutch | Multiplate dry | Multiplate dry |
| Lubrication system | Dry sump | Dry sump |
| Chassis | ||
| Front suspension | Quick adjustable shock-streering damper | Quick adjustable shock-streering damper |
| Rear suspension | None-rigid | None-rigid |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Diameter (mm) | 7 | 7 |
| Frame type | Duplex cradle | Duplex cradle |
| Front tyre | 4.00-18 | 4.00-18 |
| Rear tyre | 4.00-18 | 4.00-18 |
| Seat | Single seat | Single seat |
| Other | ||
| Color options |
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| Dimensions | ||
| Wheelbase (mm) | 1,372 | 1,372 |
| Kerb weight (kg) | 204 | 204 |
| Performance | ||
| Fuel capacity (l) | 17 | 17 |
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