| TECHNICAL SPECIFICATION |
|---|
| Model ID |
|---|
| Manufacturer (Make) | Yamaha |
| Model Name | BWs Naked |
| Year | 2011 |
| Category(class) | Scooter |
| Engine |
|---|
| Engine Capacity (Displacement) | 49 ccm (2.99 cubic inches) |
| Engine Type | Single cylinder, two-stroke |
| Bore x Stroke | Ø40.0 mm x 39.2 mm (Ø1.57 inches x 1.54 inches) |
| Bore/Stroke Ratio | 1.02 |
| Compression Ratio | 7.2:1 |
| Ignition | CDI |
| Starter System | Electric & kick |
| Lubrication System | Separate lubrication |
| Cooling System | Air |
| Powertrain |
|---|
| Transmission (Final Drive) | Belt |
| Chassis/Suspension/Brakes |
|---|
| Frame Type | Steel |
| Front Suspension | Telescopic fork |
| Front Suspension Travel | 70 mm (2.76 inches) |
| Rear Suspension | Unit swing |
| Rear Suspension Travel | 70 mm (2.76 inches) |
| Front Brakes | Single disc |
| Front Brakes Diameter | Ø180 mm (Ø7.09 inches) |
| Rear Brakes | Expanding brake (drum brake) |
| Rear Brakes Diameter | Ø110 mm (Ø4.33 inches) |
| Front Tire | 120/90-10 |
| Rear Tire | 150/80-10 |
| Dimensions |
|---|
| Overall Length | 1685 mm (66.34 inches) |
| Overall Width | 675 mm (26.57 inches) |
| Overall Height | 1049 mm (41.3 inches) |
| Seat Height | 768 mm (30.24 inches) |
| Wheelbase | 1172 mm (46.14 inches) |
| Ground Clearance | 124 mm (4.88 inches) |
| Dry Weight | 77.0 kg (170 lb) |
| Curb Weight | 82.0 kg (181 lb) |
| Fuel Capacity | 5.30 litres (1.4 gallons) |
| Performance |
|---|
| Max Power | 3.22 HP (2.4 kW) at 6500 RPM |
| Max Torque | 3.60 Nm (2.65 ft*lbs) at 6000 RPM |
| Power/Weight Ratio | 0.04 Hp/Kg |
| Top Speed | - |
| Acceleration (dart, speedup) time | |
| 0-100 km/h | - |
| 0-60 mph | - |
| 1/4 mile | - |
| 60 to 140 km/h, highest gear | - |
