Comparison of Yamaha YZ 426 F and Yamaha YZ450F 2008 [S]ave
| Attribute |  Yamaha YZ450F 2008 × |  Yamaha YZ 426 F × |
|---|---|---|
| General | ||
| Production from (year) | 2008 | 2002 |
| Make | Yamaha | Yamaha |
| Model | Yamaha YZ450F | Yamaha YZ 426 F |
| Category | Cross / motocross | Cross / motocross |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Valves per cylinder | - | 5 |
| Displacement (cm³) | 449 | 426 |
| Cooling system | Liquid | Liquid |
| Transmission type,final drive | Chain | - |
| Bore (mm) | 95 | 95 |
| Stroke (mm) | 63.4 | 60.1 |
| Gearbox | 5-speed | - |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) | Double Overhead Cams/Twin Cam (DOHC) |
| Ignition | CDI | - |
| Compression | 12.3:1 | 12.5:1 |
| Chassis | ||
| Front suspension | Speed-Sensitive System inverted fork | - |
| Rear suspension | Fully adjustable single shock | - |
| Front brakes | Single disc | Single disc |
| Rear brakes | Single disc | Single disc |
| Diameter (mm) | 245 | 240 |
| Front tyre | 80/80-M21 | 80/100-21 |
| Rear tyre | 120/80-M19 | 110/90-19 |
| Front wheel travel (mm) | 300 | 300 |
| Rear wheel travel (mm) | 312 | 315 |
| Rake (fork angle) (degree) | 26 | - |
| Other | ||
| Color options |
| - |
| Dimensions | ||
| Wheelbase (mm) | 1,494 | 1,490 |
| Dry weight (kg) | 99 | 105 |
| Overall height (mm) | 1,306 | 1,303 |
| Overall length (mm) | 2,195 | 2,171 |
| Overall width (mm) | 826 | 827 |
| Seat height (mm) | 988 | 998 |
| Ground clearance (mm) | 373 | 375 |
| Performance | ||
| Fuel capacity (l) | 6.81 | - |
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