| Attribute | Yamaha BWs 12inch 2008 × | Rieju MX 50 Disk 2007 × |
|---|---|---|
| General | ||
| Production from (year) | 2008 | 2007 |
| Make | Yamaha | Rieju |
| Model | Yamaha BWs 12inch | Rieju MX 50 Disk |
| Category | Scooter | Minibike, cross |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Fuel system | - | Carburettor. Dell´Orto SHA 14/12 |
| Displacement (cm³) | 49.2 | 49 |
| Power (kw) | 2.3 | - |
| Cooling system | Air | - |
| Torque (Nm) | 3.6 | - |
| Bore (mm) | 40 | 39 |
| Stroke (mm) | 39.2 | 41.8 |
| Gearbox | - | Automatic |
| Ignition | CDI | - |
| Lubrication system | Wet sump | - |
| Compression | 7.2:1 | - |
| Chassis | ||
| Front suspension | Hydraulic and telescopic fork | Telescopic fork |
| Rear suspension | Hydraulic unit swing | Hydraulic monoshoch |
| Front brakes | Single disc | Single disc |
| Rear brakes | Expanding brake (drum brake) | Single disc |
| Diameter (mm) | 110 | 145 |
| Frame type | - | Steel tube with automatic welding |
| Front tyre | 120/70-12 | - |
| Rear tyre | 130/70-12 | - |
| Other | ||
| Starter | Electric & kick | Kick |
| Dimensions | ||
| Wheelbase (mm) | 1,172 | 1,100 |
| Dry weight (kg) | 75 | 46 |
| Power/weight ratio | 0.0307 | - |
| Overall height (mm) | 1,052 | 995 |
| Overall length (mm) | 1,685 | 1,596 |
| Overall width (mm) | 690 | 685 |
| Seat height (mm) | 768 | 740 |
| Ground clearance (mm) | 124 | - |
| Performance | ||
| Fuel capacity (l) | 5.3 | - |