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YZ450FX

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.

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Features

Powerful 450cc Engine
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
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.

Bilateral beam frame
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
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
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.

Cross County Features
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.

Technical Specifications

YZ450FX
Yamaha YZ Finance Showroom
Engine Type
Liquid-cooled, 4-stroke, DOHC, 4-valve
Displacement (cc)
450
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
Length (mm)
2170
Width (mm)
825
Height (mm)
1265
Seat Height (mm)
955
Wheelbase (mm)
1470
Ground Clearance (mm)
330
Wet Weight (kg)
114
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
showroom_folder				yz450fx
showroom_brand				yamaha
showroom_brand_wufoo		yamaha
showroom_gallery_count		
showroom_technology_data	
showroom_engine_data		Engine Type|Liquid-cooled, 4-stroke, DOHC, 4-valve;Displacement (cc)|450;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
showroom_chassis_data		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
showroom_dimensions_data	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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content_description1		

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.

content_description2

Engine Type|Liquid-cooled, 4-stroke, DOHC, 4-valve;Displacement (cc)|450;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

content_description3 content_allow_reviews n content_author content_external_ref1 content_external_ref2 content_external_ref3 showroom-Yamaha-YZ450FX content_compatibility_code n content_external_src content_fullpath Yamaha YZ450FX content_level 2 content_id 3046 content_module content_name YZ450FX content_short_description1 content_short_description2 content_short_description3 content_type_code showroom content_type_id 15 content_type_name Showroom date_posted 0000-00-00 00:00:00 date_updated 2026-05-06 15:22:07 page_editor page_header YZ450FX page_id 3046 page_index page_subheader parent_content_id 3033 parent_id 3033 rating 0 reviews 0 sortorder 0 subtitle templatebody showroom_model templatefoot templatehead templatesearch thumb_content_type_id 0 timestamp 2026-05-06 15:22:07