Comparison of Simplex Automatic 1957 and Yamaha RZ 50 2006 [S]ave
| Attribute |  Yamaha RZ 50 2006 × |  Simplex Automatic 1957 × |
|---|---|---|
| General | ||
| Production from (year) | 2006 | 1957 |
| Make | Yamaha | Simplex |
| Model | Yamaha RZ 50 | Simplex Automatic |
| Category | Sport | Allround |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Fuel system | Carburettor | Carburettor |
| Displacement (cm³) | 49 | 130 |
| Power (kw) | 5.2 | 2.9 |
| Transmission type,final drive | Chain | Belt |
| Torque (Nm) | 5.9 | - |
| Bore (mm) | 40 | 50.8 |
| Stroke (mm) | 37 | 64.3 |
| Gearbox | 6-speed | - |
| Fuel control | - | Overhead Valves (OHV) |
| Ignition | C.D.I. Formula | Magneto |
| Clutch | Wet multiple plate coil springs | Variable speed automatic |
| Compression | 7.5:1 | 6.5:1 |
| Chassis | ||
| Front suspension | Hydraulic telescopic fork | Leading link |
| Rear suspension | Swingarm with twin shocks | Rigid |
| Front brakes | Single disc | - |
| Rear brakes | Single disc | Expanding brake (drum brake) |
| Dimensions | ||
| Wheelbase (mm) | 1,215 | 1,194 |
| Dry weight (kg) | 80 | 61 |
| Power/weight ratio | 0.065 | 0.0474 |
| Performance | ||
| Fuel capacity (l) | - | 9.46 |
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