2020 Yamaha YZ450F

For 2020 the all-new YZ450F comes with less weight, more power and sharper handling, making it the most competitive 450cc model that Yamaha has ever produced.

In order to create a motocross bike that can race and win at every level against the toughest opposition, Yamaha's engineers have analysed every single component and made a wide range of improvements.

As a result of this intensive part-by-part analysis the entire motorcycle has been subject to an extensive redesign, and the team of engineers has succeeded in achieving significant weight savings together with power gains and enhanced handling performance for the 2020 YZ450F.


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More powerful and compact engine

Already renowned for its enormous power output, the YZ450F engine has been thoroughly redesigned for 2020 to deliver stronger and more controllable performance. The new engine is significantly more compact and lighter, and the revised configuration enhances the bike's mass centralised design to make it one of the easiest-handling open class motocross machines.

Light aluminium frame

To reduce weight and fine tune the bike's instinctive handling performance, the new bilateral frame features thinner main spars together with thicker bottom tubes and new engine mounts. These significant changes - together with the mass centralised design and class-leading suspension - help to deliver even sharper handling for reduced lap times.

Yamaha smartphone tuning

By downloading the free Power Tuner app for IOS or Android devices, YZ450F riders or mechanics can easily adjust the fuel/air mix and ignition timing to set the bike up for different tracks and changing riding conditions. This feature makes the 2020 YZ450F the most adaptable motocross machine that can be tuned instantly at the trackside, enabling its rider to master a wide range of surfaces and weather conditions.

Adjustable Mapping Switch

After pre-programming the 2020 YZ450F, there's a handlebar-mounted mapping switch (blue button) that enables the rider to select maps on the fly. This simple adjustment allows instant mapping changes to suit changing track or weather conditions, from a super-aggressive map for fast dry tracks to a more useable map on muddy surfaces.

Industry leading suspension

The YZ450F is equipped with fully adjustable coil spring twin chamber KYB® forks that are widely regarded as being the ultimate in off road suspension design. Featuring new settings and speed sensitive damping that gives the idealised balance between handling and bump absorption, these exceptional front forks deliver best-in-class performance.


  • Engine
  • Chassis
  • Dimensions
Engine Type Liquid-cooled 4-stroke, DOHC, 4-valve
Displacement (cc) 449.0
Bore x Stroke (mm) 97.0 × 60.9
Compression Ratio 13.0 : 1
Lubrication System Wet sump
Fuel Management Fuel Injection
Ignition TCI
Starter System Electric
Fuel Tank Capacity (L) 6.2
Final Transmission Chain
Transmission Constant mesh, 5-speed
Frame Type Bilateral Beam
Suspension Front Telescopic forks, 310mm travel
Suspension Rear Swingarm (link suspension), 317mm travel
Brakes Front Hydraulic single disc, 270mm
Brakes Rear Hydraulic single disc, 240mm
Tyres Front 80/100-21 Dunlop MX33
Tyres Rear 120/80-19 Dunlop MX33
Length (mm) 2185
Width (mm) 825
Height (mm) 1275
Seat Height (mm) 965
Wheelbase (mm) 1481
Ground Clearance (mm) 330
Wet Weight (kg) 111