Comparison of Yamaha YZ 125 2006 and Yamaha YZ 250 2006 [S]ave
| Attribute |  Yamaha YZ 250 2006 × |  Yamaha YZ 125 2006 × |
|---|---|---|
| General | ||
| Production from (year) | 2006 | 2006 |
| Make | Yamaha | Yamaha |
| Model | Yamaha YZ 250 | Yamaha YZ 125 |
| Category | Cross / motocross | Cross / motocross |
| Engine and transmission | ||
| Engine type | V2, four-stroke | V2, four-stroke |
| Fuel system | Carburettor. Keihin PWK38S/1 | Carburettor. Mikuni TMX38 |
| Displacement (cm³) | 249 | 124 |
| Cooling system | Liquid | Liquid |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 66.4 | 54 |
| Stroke (mm) | 72 | 54.5 |
| Gearbox | 5-speed | 5-speed |
| Ignition | CDI | CDI |
| Clutch | Wet, multiple-disc | Wet, multiple-disc |
| Lubrication system | Premix | Premix |
| Compression | 8.9:1 | 8.6:1 |
| Chassis | ||
| Front suspension | Telescopic fork | Telescopic fork |
| Rear suspension | Swinging arm (link-type monocross) | Swinging arm (link-type monocross) |
| Front brakes | Single disc | Single disc |
| Rear brakes | Single disc | Single disc |
| Diameter (mm) | 245 | 245 |
| Front tyre | 80/90-M21 | 80/90-M21 |
| Rear tyre | 110/90-M19 | 100/90-M19 |
| Front wheel travel (mm) | 300 | 300 |
| Rear wheel travel (mm) | 125 | 125 |
| Other | ||
| Starter | Kick | Kick |
| Dimensions | ||
| Wheelbase (mm) | 1,481 | 1,443 |
| Dry weight (kg) | 96 | 86 |
| Overall height (mm) | 1,309 | 1,318 |
| Overall length (mm) | 2,184 | 2,139 |
| Overall width (mm) | 827 | 827 |
| Seat height (mm) | 997 | 998 |
| Ground clearance (mm) | 385 | 388 |
| Performance | ||
| Fuel capacity (l) | 8 | 8 |
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