The Yamaha BWs 12inch motorcycle specifications include a 49 cc (2.99 cu in) engine, an automatic gearbox, and a listed weight of 75 kg (165.3 lb).
Key specifications
The 2007 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
How the Yamaha BWs 12inch compares
This compares the motorcycle with all Yamaha models in this specifications database. The blue marker is this model and the grey line is the Yamaha database average.
About 91% lower than the Yamaha database average. Around the 5th percentile across Yamaha models.
Very close to the Yamaha database average. Around the 31st percentile across Yamaha models.
About 59% smaller than the Yamaha database average. Around the 9th percentile across Yamaha models.
Yamaha database percentile rankings
Percentiles show where this motorcycle sits across the Yamaha specifications database. They are descriptive database rankings, not performance ratings.
49 cc — larger displacement than about 5% of Yamaha models.
768 mm — taller than about 31% of Yamaha models.
5.3 L — larger than about 9% of Yamaha fuel tanks in this database.
Dimensions compared with Yamaha average
Each measurement is compared with the average value across Yamaha models where that dimension is available.
1,685
2,082
19% below average.
675
823
18% below average.
1,049
1,172
11% below average.
1,172
1,416
17% below average.
768
793
3% below average.
124
181
31% below average.
Mechanical overview
Additional useful specifications
| Front tire size | 120/70-12 |
|---|---|
| Rear tire size | 130/70-12 |
| Front tire width | 120 mm |
| Front tire aspect ratio | 70% |
| Front rim diameter | 12 in |
| Rear tire width | 130 mm |
| Rear tire aspect ratio | 70% |
| Rear rim diameter | 12 in |
| Bore/stroke ratio | 1.02:1 (Square) |
Model information
| Category | Scooter |
|---|
Engine specifications
| Engine type | Single cylinder, two-stroke |
|---|---|
| Displacement | 49 cc (2.99 cu in) |
| Torque | 3.6 Nm (0.4 kgf-m or 2.7 ft.lbs) @ 6,000 rpm |
| Bore × stroke | 40.0 x 39.2 mm (1.6 x 1.5 inches) |
| Compression ratio | 7.2:1 |
| Cooling system | Air |
| Fuel system | Carburettor. Gurtner PY-12 |
| Ignition | CDI |
| Starter | Electric & kick |
| Lubrication | Seperate lubrification |
Transmission and drivetrain
| Gearbox | Automatic |
|---|---|
| Final drive | Belt (final drive) |
| Clutch | Automatic centrifugal |
Chassis and suspension
| Front suspension | Hydraulic and telescopic fork |
|---|---|
| Rear suspension | Hydraulic unit swing |
Brakes, wheels and tires
| Front brakes | Single disc |
|---|---|
| Rear brakes | Expanding brake (drum brake) |
| Front tire | 120/70-12 |
| Rear tire | 130/70-12 |
Dimensions and weight
| Dry weight | 75 kg (165.3 lb) |
|---|---|
| Seat height | 768 mm (30.2 inches) |
| Overall length | 1,685 mm (66.3 inches) |
| Overall width | 675 mm (26.6 inches) |
| Overall height | 1,049 mm (41.3 inches) |
| Wheelbase | 1,172 mm (46.1 inches) |
| Ground clearance | 124 mm (4.9 inches) |
Fuel and emissions
| Fuel capacity | 5.30 L (1.40 US gal) |
|---|
Performance
| Power/weight ratio | 0.0428 hp/kg |
|---|
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Yamaha models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Yamaha information before relying on them. Visit the official Yamaha website.