Yamaha YZ 450 F - 2004 Specifications and Reviews

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.

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General information

CategoryCross / motocross
Year2004
ModelYamaha YZ 450 F

Engine and Transmission Specifications

Cooling systemLiquid
Fuel controlDOHC
Valves per cylinder5
Bore x stroke95.0 x 63.4 mm (3.7 x 2.5 inches)
Compression12.5:1
Stroke2
Engine typeSingle cylinder
Capacity:449.00 ccm (27.40 cubic inches)

Physical measures and capacities

Wheelbase1,485 mm (58.5 inches)
Ground clearance371 mm (14.6 inches)
Overall width827 mm (32.6 inches)
Overall length2,171 mm (85.5 inches)
Overall height1,303 mm (51.3 inches)
Seat height995 mm (39.2 inches) If adjustable, lowest setting.
Dry weight97.0 kg (213.8 pounds)
 
 

Yamaha YZ 450 F dimensions and frame

Rear brakes diameter245 mm (9.6 inches)
Rear brakesSingle disc
Front brakes diameter250 mm (9.8 inches)
Front brakesSingle disc
Rear tyre dimensions110/90-19
Front tyre dimensions80/100-21
Rear suspension travel315 mm (12.4 inches)
Rear suspensionSwingarm (linked type monocross)
Front suspension travel300 mm (11.8 inches)
Front suspensionTelescopic fork
 
 

Speed and acceleration

Color optionsBlue

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track55%
City5%
Cornering60%
Daily Riding8%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a full-race competition motocross bike best suited to experienced off-road or motocross riders, not beginners.
PurposeBuilt purely for motocross racing and serious off-road riding, not for commuting or general road use.
Rider FitIts tall 988mm seat height, minimal weight, and aggressive suspension travel demand good rider fitness, strength, and off-road skill to control effectively.
CharacterA light, high-revving, race-bred single-cylinder machine that rewards aggressive riding, quick direction changes, and confident throttle control.
Not Ideal ForNot suitable for riders wanting a comfortable commuter, a passenger-friendly bike, or any form of long-distance road touring.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2004 Yamaha YZ 450 F Rider Ergonomics Assessment

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Feet:

At 995mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2004 Yamaha YZ 450 F, with a moderate knee angle of around 90 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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