Comparison of Yamaha Neos 4 Stroke 2010 and Yamaha Why 2009 [S]ave
| Attribute |  Yamaha Why 2009 × |  Yamaha Neos 4 Stroke 2010 × |
|---|---|---|
| General | ||
| Production from (year) | 2009 | 2010 |
| Make | Yamaha | Yamaha |
| Model | Yamaha Why | Yamaha Neos 4 Stroke |
| Category | Scooter | Scooter |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor | Injection |
| Displacement (cm³) | 49.2 | 49.4 |
| Power (kw) | 2.3 | 2.2 |
| Cooling system | Air | Liquid |
| Transmission type,final drive | Belt | Belt |
| Torque (Nm) | 3.5 | 3.2 |
| Bore (mm) | 40 | 38 |
| Stroke (mm) | 39.2 | 43.6 |
| Gearbox | Automatic | Automatic |
| Ignition | CDI | TCI |
| Lubrication system | Separate lubrication | Wet sump |
| Compression | 7.3:1 | 12.0:1 |
| Chassis | ||
| Front suspension | Telescopic fork | Telescopic fork |
| Rear suspension | Unit swing | Unit swing |
| Front brakes | Single disc | Single disc |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Diameter (mm) | 110 | 110 |
| Front tyre | 70/90-16 | 120/70-12 |
| Rear tyre | 80/90-16 | 130/70-12 |
| Front wheel travel (mm) | 80 | 70 |
| Rear wheel travel (mm) | 70 | 60 |
| Other | ||
| Starter | Electric & kick | Electric & kick |
| Color options | - |
|
| Dimensions | ||
| Wheelbase (mm) | 1,294 | 1,275 |
| Kerb weight (kg) | 78 | 95 |
| Overall height (mm) | 1,105 | 1,118 |
| Overall length (mm) | 1,940 | 1,840 |
| Overall width (mm) | 685 | 663 |
| Seat height (mm) | 765 | 790 |
| Ground clearance (mm) | 125 | 154 |
| Performance | ||
| Fuel capacity (l) | 7 | 5.4 |
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