The Yamaha Why motorcycle specifications include a 49 cc (2.99 cu in) engine, power of 3.4 hp (2.4 kW) @ 6,500 rpm, a 5-speed gearbox, and a listed weight of 73 kg (160.9 lb).
Key specifications
The 2006 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
How the Yamaha Why 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 94% lower than the Yamaha database average. Around the 7th percentile across Yamaha models.
About 91% lower than the Yamaha database average. Around the 5th percentile across Yamaha models.
Very close to the Yamaha database average. Around the 30th percentile across Yamaha models.
About 45% smaller than the Yamaha database average. Around the 21st percentile across Yamaha models.
Dimensions compared with Yamaha average
Each measurement is compared with the average value across Yamaha models where that dimension is available.
1,940
2,082
7% below average.
685
823
17% below average.
1,105
1,172
6% below average.
1,294
1,416
9% below average.
765
793
4% below average.
125
181
31% below average.
Mechanical overview
Additional useful specifications
| Front tire size | 70/90-16 |
|---|---|
| Rear tire size | 80/90-16 |
| Front tire width | 70 mm |
| Front tire aspect ratio | 90% |
| Front rim diameter | 16 in |
| Rear tire width | 80 mm |
| Rear tire aspect ratio | 90% |
| Rear rim diameter | 16 in |
| Power-to-weight ratio | 0.047 hp/kg |
| Power-to-weight | 46.6 hp/tonne |
| Specific power | 69.4 hp/L |
| Bore/stroke ratio | 1.02:1 (Square) |
Engine specifications
| Engine type | Single cylinder, two-stroke |
|---|---|
| Displacement | 49 cc (2.99 cu in) |
| Power | 3.4 hp (2.4 kW) @ 6,500 rpm |
| Torque | 3.9 Nm (0.4 kgf-m or 2.8 ft.lbs) @ 6,200 rpm |
| Bore × stroke | 40.0 x 39.2 mm (1.6 x 1.5 inches) |
| Compression ratio | 11.2:1 |
| Cooling system | Air |
| Fuel system | Carburettor |
| Ignition | Electric (CDI) |
| Starter | Electric & kick |
| Lubrication | Seperate lubrification |
Transmission and drivetrain
| Gearbox | 5-speed |
|---|---|
| Final drive | Chain (final drive) |
| Clutch | Automatic centrifugal |
Chassis and suspension
| Front suspension | Hydraulic and telescopic fork |
|---|---|
| Rear suspension | Swingarm with single shock |
Brakes, wheels and tires
| Front brakes | Single disc |
|---|---|
| Rear brakes | Expanding brake (drum brake) |
| Front tire | 70/90-16 |
| Rear tire | 80/90-16 |
Dimensions and weight
| Dry weight | 73 kg (160.9 lb) |
|---|---|
| Seat height | 765 mm (30.1 inches) |
| Overall length | 1,940 mm (76.4 inches) |
| Overall width | 685 mm (27.0 inches) |
| Overall height | 1,105 mm (43.5 inches) |
| Wheelbase | 1,294 mm (50.9 inches) |
| Ground clearance | 125 mm (4.9 inches) |
Fuel and emissions
| Fuel capacity | 7.20 L (1.90 US gal) |
|---|
Performance
| Power/weight ratio | 0.0459 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.