Based on the benchmark-setting YZ450F motocrosser, the YZ450FX is designed to dominate cross country competition.
Its lightweight, compact chassis, powerful four-stroke engine, exceptional rider ergonomics, and Yamaha’s groundbreaking next-generation Power Tuner app all carry over directly from the class-leading YZ450F.
Additional modifications tailored toward enhanced XC performance include a wide-ratio transmission, larger fuel capacity, 18-inch rear wheel, side stand, skid plate, revised ECU and suspension settings, along with a 10mm lower seat height for increased manoeuvrability in challenging off-road conditions.
Features
Powerful 450cc Engine
The YZ450FX's advanced compact four-stroke engine is higher revving and produces broad power across the entire rev range. Additionally, ECU settings are tailored to suit the specific needs of trail riding and enduro competition.
Adjustable Engine Mapping
The lightweight handlebar-mounted switchgear allows the rider to quickly select between preloaded engine maps—loaded and configured in the Power Tuner App—to adjust for changing riding conditions. Map 1 provides more responsive, quicker revving engine characteristics while Map 2 provides smoother response and slower revving characteristics for when traction is limited.
Cross County Features
With the electric starting system, a 7.8L fuel tank, rugged plastic skid plate, 18-inch rear wheel and XC racing tyres, the YZ450FX is ready to win right out of the box.
Bilateral beam frame
Striking the perfect balance of precise cornering performance and handling stability, the aluminium bilateral beam frame consists of more than 10 different aluminium components welded together with YZ450FX-specific XC-tuned engine mounts. The result is a better handling machine with lighter feel, improved bump absorption and increased traction, allowing the rider to enter corners with greater confidence and more line choices.
Class Leading Suspension
World renowned suspension performance straight out of the box. High-spec fully adjustable Speed Sensitive System KYB® coil spring-type fork provides exceptional bump absorption, and features toolless compression clickers for easy adjustment and while fork covers help prevent debris damage. The linkage-type rear suspension features a KYB® shock with cross-country focused damping characteristics to match the YZ450FX's refined chassis.
Yamaha Power Tuner App
The free-of-charge Yamaha Power Tuner App brings the power of the GYTR® Power Tuner to an iOS® or Android® device, allowing owners to adjust air/fuel mixture and ignition timing, log race set-up information, and monitor a range of data such as maintenance and system diagnosis, engine run time, and more. The newest version of the app has been revised to be more user-friendly, with new features include an intuitive “Simple Tuning” slide bar for engine mapping, Traction Control tuning, lap timer, and helpful engine and suspension tuning guides.
Technical Specification
Colours
Engine
Chassis
Dimensions
| Engine Type | Liquid-cooled, 4-stroke, DOHC, 4-valve |
| Displacement (cc) | 450.0 |
| Bore x Stroke (mm) | 97.0 x 60.8 |
| Compression Ratio | 13.0 : 1 |
| Lubrication System | Dry sump |
| Fuel Management | Fuel Injection |
| Ignition | TCI |
| Starter System | Electric |
| Fuel Tank Capacity (L) | 7.8 |
| Final Transmission | Chain |
| Transmission | Constant mesh 5-speed |
| Frame Type | Bilateral beam |
| Suspension Front | Telescopic forks, 300mm travel |
| Suspension Rear | Swingarm (link suspension), 306mm travel |
| Brakes Front | Hydraulic single disc, 270mm |
| Brakes Rear | Hydraulic single disc, 240mm |
| Tyres Front | 80/100-21 51M Tube type |
| Tyres Rear | 120/90-18 65M Tube type |
| Length (mm) | 2170 |
| Width (mm) | 825 |
| Height (mm) | 1265 |
| Seat Height (mm) | 955 |
| Wheelbase (mm) | 1470 |
| Ground Clearance (mm) | 330 |
| Wet Weight (kg) | 114 |
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