Motocross Bikes
2018Yamaha YZ450FX
39 fields on record
The 2018 Yamaha YZ450FX is a four-stroke motocross bike engineered for intermediate to advanced riders seeking a versatile off-road machine. Known for its electric starter convenience and manageable 118.8 kg weight, it excels in varying terrain conditions while delivering reliable performance through its 5-speed transmission. The YZ450FX balances power delivery with user-friendly characteristics, making it ideal for weekend warriors and competitive riders alike.
- Capacity
- 449.7 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 118.8 kg
- Seat height
- 965 mm
- Power
- 50.0 HP (36.8 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for closed-course cross-country and enduro-style off-road riding rather than street use or commuting.
- Built for
- A high-revving, race-derived thumper that rewards an aggressive, momentum-focused riding style with sharp handling and light overall mass.
- Not ideal for
- Not a good fit for new riders, passengers, highway commuting, or anyone wanting plush comfort and long-range touring capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 449.7 ccm
- Power
- 50.0 HP (36.8 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.4209 HP/kg (wet)
- 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
- Wet multi-disc
Dimensions & weight
- Wheelbase
- 1481 mm
- Overall length
- 2174 mm
- Overall width
- 826 mm
- Overall height
- 1290 mm
- Seat height
- 965 mm
- Wet weight
- 118.8 kg
- Fuel capacity
- 7.60 litres
- Ground clearance
- 335 mm
- Dry weight
- Not on record - add it
Chassis & suspension
- Frame
- Aluminum Bilateral Beam frame
- Front suspension
- KYB® spring-type fork with speed sensitive damping; fully adjustable
- Rear suspension
- KYB® single shock; full adjustable
- Front wheel travel
- 310 mm
- Rear wheel travel
- 318 mm
- Rake (fork angle)
- 28.0°
- Trail
- 117 mm
Brakes & wheels
- Front brakes
- Single disc. Hydraulic
- Front brakes diameter
- 270 mm
- Rear brakes
- Single disc. Hydraulic
- Rear brakes diameter
- 245 mm
- Front tyre
- 90/90-21
- Rear tyre
- 120/90-18
Other
- Color options
- Team Yamaha Blue
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 | 2016 | 2018 | 2019 | 2022 | 2024 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 450 cc | 450 cc | 450 cc | 450 cc | 450 cc | 450 cc |
| Seat height | 965 mm | 965 mm | 965 mm | 955 mm | 955 mm | 955 mm |
| Fuel capacity | 7.6 L | 7.6 L | 8.3 L | 8.3 L | 8.3 L | 7.9 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Yamaha YZ450FX?
The 2018 Yamaha YZ450FX has a Capacity of 449.7 ccm (27.44 cubic inches).
What engine power does the Yamaha YZ450FX have?
The 2018 Yamaha YZ450FX has a Power of 50.0 HP (36.8 kW).
How many gears does the Yamaha YZ450FX have?
The 2018 Yamaha YZ450FX has a Gearbox of 5-speed.
How much does the Yamaha YZ450FX weigh?
The 2018 Yamaha YZ450FX has a Wet weight of 118.8 kg (261.9 pounds).
Shop this bike
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The 2018 Yamaha YZ450FX is a high-performance off-road motorcycle designed for the most demanding trails. With its powerful 450cc engine and lightweight frame, this bike delivers impressive speed and agility in the toughest off-road conditions. The YZ450FX also features advanced suspension and handling, making it a top choice for riders who want to push the limits of their off-road adventures. Whether you're tackling rocky terrain or navigating through tight corners, the YZ450FX provides the reliability and performance you need to conquer any trail.
If you're looking for a top-of-the-line off-road motorcycle, the 2018 Yamaha YZ450FX is a fantastic option. Its powerful engine, lightweight design, and advanced suspension make it a versatile and capable choice for riders of all skill levels. Whether you're a seasoned off-road enthusiast or a beginner looking to elevate your riding experience, the YZ450FX delivers the performance and handling you need to take on any trail with confidence.
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