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Motocross Bikes

2018Yamaha YZ450F

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The 2018 Yamaha YZ450F is a high-performance four-stroke motocross bike engineered for competitive riders seeking power and precision. Known for its potent engine featuring titanium valves and electric starter, it delivers responsive handling and reliable braking through its 250mm front and 245mm rear disc brakes. This lightweight, agile machine excels in professional and amateur racing environments.

Capacity: 449.0 ccm
Engine: Single, four-stroke
Gearbox: 5-speed
Dry weight: 99.3 kg
Seat height: 975 mm
Power: 56.0 HP (41.2 kW)

⇄ Compare with another bike All model years

What’s new for the 2018 Yamaha YZ450F

vs the 2017

Spec	2017	2018
Rear suspension	Monoshock, adjustable preload and rebound damping	KYBÂ® single shock; fully adjustable

Other years 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail97%

Cornering88%

City riding10%

Daily riding10%

Touring10%

Two-up5%

Track90%

Best for: Built purely for motocross racing and hard off-road riding, excelling on tracks and rough terrain rather than street use.
Built for: Sharp, high-revving, and razor-responsive, it rewards committed, active riding with explosive acceleration and precise cornering manners.
Not ideal for: It is not suited for commuting, touring, passengers, or casual low-speed street riding due to its lack of lights, mirrors, and road-going comfort features.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 975mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2018 Yamaha YZ450F, with a cramped knee angle of around 85 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

Find bikes that fit your height →

Full specifications

Engine

Capacity: 449.0 ccm
Power: 56.0 HP (41.2 kW)
Engine type: Single, four-stroke
Power/weight ratio: 0.5639 HP/kg (dry)
Bore x stroke: 97.0 x 60.8 mm
Compression: 12.5:1
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Ignition: TCI
Valves per cylinder: 4
Lubrication system: Wet sump

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Chain
Clutch: Multiplate wet clutch

Dimensions & weight

Wheelbase: 1481 mm
Overall length: 2174 mm
Overall width: 826 mm
Overall height: 1290 mm
Seat height: 975 mm
Dry weight: 99.3 kg
Wet weight: 111.1 kg
Fuel capacity: 7.60 litres
Ground clearance: 335 mm
Oil capacity: 1.00 litres

Chassis & suspension

Frame: Bilateral beam frame
Front suspension: KYB Speed-Sensitive System, inverted fork: fully adjustable
Rear suspension: KYBÂ® single shock; fully adjustable
Front wheel travel: 310 mm
Rear wheel travel: 315 mm
Rake (fork angle): 27.3°
Trail: 119 mm

Brakes & wheels

Front brakes: Single disc. Hydraulic.
Front brakes diameter: 250 mm
Rear brakes: Single disc. Hydraulic.
Rear brakes diameter: 245 mm
Front tyre: 80/100-21
Rear tyre: 120/80-19

Other

Color options: Blue/white, White

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	2008	2013	2018	2022	2027
Capacity	449 cc	449 cc	449 cc	449 cc	450 cc
Dry weight	99 kg	99 kg	99 kg	99 kg	99 kg
Seat height	988 mm	1001 mm	975 mm	965 mm	965 mm
Fuel capacity	6.8 L	6.1 L	7.6 L	6.1 L	6.1 L

Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.

Rider Reviews

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MotorcycleDB Review

The 2018 Yamaha YZ450F is an exceptional off-road motorcycle that offers a powerful and responsive ride. With advanced features such as electric start, smartphone tuning capabilities, and industry-leading suspension, this bike is a top choice for serious riders. The lightweight design and nimble handling make it easy to maneuver through tough terrain, while the high-performance engine delivers impressive speed and acceleration. Overall, the 2018 Yamaha YZ450F is a standout motorcycle that excels in both performance and reliability.

If you're in the market for a top-of-the-line off-road motorcycle, the 2018 Yamaha YZ450F is a must-see. Its cutting-edge technology and superior handling make it a standout choice in its class. With its powerful engine and advanced features, this bike is sure to impress even the most discerning riders. Whether you're a seasoned pro or a weekend warrior, the 2018 Yamaha YZ450F offers an exhilarating ride that is sure to satisfy your adrenaline cravings.