| MODEL | YAMAHA WR 450F 2019 - 2020 |
| Year | 2019 - 2020 |
| Engine Type | Four stroke, single cylinder, 4 titanium valves |
| Displacement / Capacity | — |
| Bore X Stroke | 97.0 x 60.9 mm |
| Compression Ratio | 12.8:1 |
| Cooling System | Liquid cooled |
| Max Power | — |
| Max Torque | — |
| Ignition | — |
| Induction | Fuel injection |
| Start System | Electric, no kick starter |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5-speed, wide-ratio |
| Clutch | — |
| Final Drive | O-ring chain |
| CHASSIS SPECS | |
| Frame | Bilateral beam |
| Front Suspension | KYB SSS coil spring fork, fully adjustable, 310 mm / 12.2 in travel |
| Rear Suspension | Coil spring shock, 318 mm / 12.5 in travel |
| Front Brakes | 270 mm disc |
| Rear Brakes | 245 mm disc |
| DIMENSION SPECS | |
| Overall Length | 85.6 in |
| Overall Width | 32.5 in |
| Overall Height | 50.0 in |
| Seat Height | 955 mm / 37.6 in |
| Wheelbase | 1481 mm / 58.3 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 120 kg / 265 lbs |
| WHEEL SPECS | |
| Front Tyre | 80/100-21 |
| Rear Tyre | 120/90-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 8.3 Litres / 2.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 2019 WR450F was a ground-up revision on the YZ450F platform, with a more compact frame, a lower seat and a retuned engine. The fuel tank grew to about 2.2 US gallons, the starter moved behind the cylinder with switch-free starting, and the suspension and clutch were lightened and refined for enduro riding.
