Motocross Bikes
2004Yamaha YZ 450 F
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The 2004 Yamaha YZ 450 F is a high-performance four-stroke motocross bike designed for intermediate to advanced riders seeking competitive racing capability. Its potent 449cc liquid-cooled single-cylinder engine delivers strong power delivery and reliability, making it best known for dominating the 450cc motocross class during its era.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 97.0 kg
- Seat height
- 995 mm
- Power
- 44.9 HP (33.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross racing and serious off-road riding, not for commuting or general road use.
- Built for
- A light, high-revving, race-bred single-cylinder machine that rewards aggressive riding, quick direction changes, and confident throttle control.
- Not ideal for
- Not suitable for riders wanting a comfortable commuter, a passenger-friendly bike, or any form of long-distance road touring.
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
- 449.0 ccm
- Power
- 44.9 HP (33.0 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.4629 HP/kg
- Bore x stroke
- 95.0 x 63.4 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Electric
- Ignition
- CDI
- Valves per cylinder
- 5
- Lubrication system
- Dry sump
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multiplate, wet
Dimensions & weight
- Wheelbase
- 1485 mm
- Overall length
- 2171 mm
- Overall width
- 827 mm
- Overall height
- 1303 mm
- Seat height
- 995 mm
- Dry weight
- 97.0 kg
- Wet weight
- 108.0 kg
- Fuel capacity
- 6.80 litres
- Ground clearance
- 371 mm
- Oil capacity
- 1.20 litres
Chassis & suspension
- Frame
- Wet multi-plate
- Front suspension
- Telescopic fork
- Rear suspension
- Swingarm (linked type monocross)
- Front wheel travel
- 300 mm
- Rear wheel travel
- 315 mm
- Rake (fork angle)
- 27.2°
- Trail
- 119 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 250 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 245 mm
- Front tyre
- 80/100-21
- Rear tyre
- 110/90-19
Other
- Color options
- 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 | 2004 | 2005 | 2006 | 2007 |
|---|---|---|---|---|
| Capacity | 449.00 ccm (27.40 cubic inches) | 449.00 ccm (27.40 cubic inches) | 449.00 ccm (27.40 cubic inches) | 449.00 ccm (27.40 cubic inches) |
| Dry weight | 97.0 kg (213.8 pounds) | — | 99.8 kg (220.0 pounds) | 99.8 kg (220.0 pounds) |
| Seat height | 995 mm (39.2 inches) | 996 mm (39.2 inches) | 998 mm (39.3 inches) | 988 mm (38.9 inches) |
| Fuel capacity | — | 6.81 litres (1.80 gallons) | 7.00 litres (1.85 gallons) | 6.81 litres (1.80 gallons) |
| Color options | Blue | Team Yamaha Blue/White | — | — |
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 YZ 450 F?
The 2004 Yamaha YZ 450 F has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Yamaha YZ 450 F have?
The 2004 Yamaha YZ 450 F has a Power of 44.9 HP (33.0 kW).
How many gears does the Yamaha YZ 450 F have?
The 2004 Yamaha YZ 450 F has a Gearbox of 5-speed.
How much does the Yamaha YZ 450 F weigh?
The 2004 Yamaha YZ 450 F has a Dry weight of 97.0 kg (213.8 pounds).
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