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.
*Images are shown for reference only, product specifications and data are subject to change without notice.
The YZ450F is the world’s first production motocross bike with a wireless smartphone based engine tuner. The all new Yamaha new Power Tuner iOS® and Android® app and communication control unit connects the rider with the bike like never before. The new Yamaha Power Tuner app can make fuel and ignition mapping changes – uploaded wirelessly to the bike via the onboard Wi-Fi system – for the ultimate in track-side tuning.
Yamaha has refined its distinct rearward-slanted cylinder design for the YZ450F engine – complete with a rear exhaust and forward-mounted downdraft intake system. The all-new cylinder head is lighter and the cylinder slant is more upright to work with the bike’s updated frame for optimised front weight distribution.
The all-new compact bilateral beam frame was designed for the best possible balance of bump absorption, stiffness and cornering. Upper frame rigidity is increased while rear frame spars and all new engine mounts centralise mass to provide an ideal balance between cornering feel and straight-line rigidity.
The industry-leading, fully adjustable KYB® spring-type fork suspension with speed sensitive damping provides exceptional balance between handling and bump absorption for race-winning performance. In addition to new settings, cylinder diameter is up 1mm to increase rigidity and the mid-speed valve is has changed from coil to leaf spring for improved oil flow and damping.
Running a compact high output starter motor and ultra-lightweight lithium-ion battery, the YZ450F brings the convenience of push-button starting to the racetrack for effortless restarts under pressure and relaxed riding when the clock isn’t ticking. The system is designed to add minimal weight while saving valuable seconds in a trackside re-start situation.
The YZ450F has some notable additional features such as a starter motor, battery and bigger radiators with corresponding increase in fluid capacity. Yet it tips the scales at 111kg. How is this achieved? Factory engineers have gone back to the drawing board to save weight on components where Yamaha’s legendary reliability is not compromised.
| Engine Type | Liquid cooled, single cylinder, 4-stroke, DOHC, 4-valve |
| Displacement | 449 cc |
| Bore x Stroke | 97.0 × 60.9 mm |
| Compression Ratio | 13.0 : 1 |
| Lubrication System | Wet sump |
| Fuel Management | EFI |
| Ignition | TCI |
| Starter System | Electric |
| Fuel Tank Capacity | 6.2 L |
| Oil Capacity | 0.9 L |
| Final Transmission | Chain |
| Transmission | Constant mesh, 5-speed |
| Length | 2185 mm |
| Width | 825 mm |
| Height | 1275 mm |
| Seat Height | 965 mm |
| Wheelbase | 1481 mm |
| Ground Clearance | 330 mm |
| Wet Weight | 111 kg with 6.2 litres of fuel |
| Frame Type | Bilateral Beam |
| Suspension Front | Telescopic forks, 310mm travel |
| Suspension Rear | Swingarm (link suspension), 317mm travel |
| Brakes Front | Hydraulic disc, 270mm disc |
| Brakes Rear | Hydraulic disc, 240mm disc |
| Tyres Front | 80/100-21 Dunlop MX33 |
| Tyres Rear | 120/80-19 Dunlop MX33 |
