Attribute | Yamaha BWs Naked 50 2014 × | Keeway Swan 50 2014 × |
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General | ||
Production from (year) | 2014 | 2014 |
Make | Yamaha | Keeway |
Model | Yamaha BWs Naked 50 | Keeway Swan 50 |
Category | Scooter | Scooter |
Engine and transmission | ||
Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
Fuel system | Carburettor. Gurtner | Carburettor |
Displacement (cm³) | 49.2 | 49.3 |
Power (kw) | 2.4 | 2.7 |
Cooling system | Air | Air |
Transmission type,final drive | Belt | Belt |
Torque (Nm) | 3.6 | 4.2 |
Bore (mm) | 40 | 40 |
Stroke (mm) | 39.2 | 39.2 |
Gearbox | Automatic | Automatic |
Ignition | CDI | CDI |
Clutch | - | Automatic |
Lubrication system | Separate lubrication | Separate lubrication |
Compression | 7.2:1 | 6.9:1 |
Chassis | ||
Front suspension | Telescopic fork | Telescopic forks |
Rear suspension | Unit swing | Telescopic coil spring oil damped |
Front brakes | Single disc | Single disc |
Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
Diameter (mm) | 110 | 110 |
Frame type | Steel | - |
Front tyre | 120/90-10 | 3.50-10 |
Rear tyre | 150/80-10 | 3.50-10 |
Seat | Dual seat with passenger grab handles | - |
Wheels | Alloy wheels | - |
Front wheel travel (mm) | 70 | 70 |
Rear wheel travel (mm) | 70 | 45 |
Other | ||
Starter | Electric & kick | Electric & kick |
Color options |
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Light | Twin headlights | - |
Dimensions | ||
Wheelbase (mm) | 1,172 | 1,190 |
Dry weight (kg) | 83 | 75 |
Power/weight ratio | 0.0289 | 0.036 |
Overall height (mm) | 1,070 | 1,090 |
Overall length (mm) | 1,685 | 1,680 |
Overall width (mm) | 690 | 600 |
Seat height (mm) | 768 | 765 |
Ground clearance (mm) | 124 | 105 |
Performance | ||
Fuel capacity (l) | 5.3 | 3.7 |