Comparison of Yamaha WR450F 2021 and Yamaha YZ450F 2020 [S]ave
| Attribute |  Yamaha YZ450F 2020 × |  Yamaha WR450F 2021 × |
|---|---|---|
| General | ||
| Production from (year) | 2020 | 2021 |
| Make | Yamaha | Yamaha |
| Model | Yamaha YZ450F | Yamaha WR450F |
| Category | Cross / motocross | Enduro / offroad |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Valves per cylinder | 4 | 4 |
| Fuel system | Injection. Mikuni® fuel injection, 44mm | Injection. Mikuni® fuel injection, 44mm |
| Engine details | Titanium-valves | - |
| Displacement (cm³) | 449 | 450 |
| Cooling system | Liquid | Liquid |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 97 | 97 |
| Stroke (mm) | 60.9 | 60.8 |
| Gearbox | 5-speed | 5-speed |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) | Double Overhead Cams/Twin Cam (DOHC) |
| Driveline | - | O-ring chain |
| Ignition | TCI: Transistor Controlled Ignition | TCI |
| Clutch | Multiplate wet clutch | Multiplate wet clutch |
| Lubrication system | Wet sump | Dry sump |
| Compression | 13.0:1 | 13.0:1 |
| Chassis | ||
| Front suspension | KYB Speed-Sensitive System, inverted fork: fully adjustable | KYB® Speed-Sensitive System inverted fork; fully adjustable |
| Rear suspension | KYB® single shock; fully adjustable | KYB® single shock; fully adjustable |
| Front brakes | Single disc. Hydraulic. | Single disc. Hydraulic. |
| Rear brakes | Single disc. Hydraulic. | Single disc. Hydraulic. |
| Diameter (mm) | 240 | 245 |
| Frame type | Bilateral beam frame | Aluminium beam frame with optimised rigidity |
| Front tyre | 80/100-21 | 80/100-21 |
| Rear tyre | 120/80-19 | 120/90-18 |
| Seat | Long, two-tone, motocross-style seat | - |
| Wheels | Dunlop® MX33® tyres | Wire spoked. Blue rims. Dunlop MX3S tyres. |
| Front wheel travel (mm) | 310 | 310 |
| Rear wheel travel (mm) | 318 | 318 |
| Trail (mm) | 119 | 117 |
| Rake (fork angle) (degree) | 27.3 | 27 |
| Other | ||
| Starter | Electric | Electric |
| Color options |
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|
| Dimensions | ||
| Wheelbase (mm) | 1,486 | 1,481 |
| Kerb weight (kg) | 111.1 | 118.8 |
| Overall height (mm) | 1,275 | 1,270 |
| Overall length (mm) | 2,184 | 2,174 |
| Overall width (mm) | 826 | 826 |
| Seat height (mm) | 965 | 955 |
| Ground clearance (mm) | 330 | 320 |
| Performance | ||
| Fuel capacity (l) | 6.06 | 8.33 |
| Oil capacity (l) | - | 0.8 |
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