| MODEL | YAMAHA YZ450FX 2024 |
| Year | 2024 |
| Engine Type | Single cylinder, 4-stroke, DOHC, 4 titanium valves |
| Displacement / Capacity | 450 cc |
| Bore X Stroke | 97.0 x 60.8 mm |
| Compression Ratio | 13.0:1 |
| Cooling System | Liquid cooled |
| Max Power | — |
| Max Torque | — |
| Ignition | TCI |
| Induction | Fuel injection, 44 mm throttle body |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5-speed, constant mesh |
| Clutch | Wet, multiplate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Fully adjustable 48 mm inverted KYB fork, 300 mm / 11.8 in travel |
| Rear Suspension | Fully adjustable linkage-type KYB shock, 305 mm / 12.0 in travel |
| Front Brakes | Single 270 mm floating disc, twin-piston caliper |
| Rear Brakes | Single 240 mm disc, single-piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2,169 mm / 85.4 in |
| Overall Width | 825 mm / 32.5 in |
| Overall Height | 1,265 mm / 49.8 in |
| Seat Height | 955 mm / 37.6 in |
| Wheelbase | 1,471 mm / 57.9 in |
| Ground Clearance | 330 mm / 13.0 in |
| Dry Weight | — |
| Wet Weight | 113.9 kg / 251 lb |
| WHEEL SPECS | |
| Front Tyre | 80/100-21 |
| Rear Tyre | 120/90-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 7.95 Litres / 2.1 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The YZ450FX is the cross-country (off-road racing) version of Yamaha's 450 motocross bike. Compared with the motocross YZ450F of the same period it has a larger fuel tank (about 8 L) and an 18-inch rear wheel, and a slightly lower seat and shorter suspension travel. It is meant for cross-country events rather than short motocross races.
