2004 Yamaha YZ450F Review

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2004 Yamaha YZ450F
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2004 Yamaha YZ450F
2004 Yamaha YZ450F

2004 Yamaha YZ450F
2004 Yamaha YZ450F

2004 Yamaha YZ450F Review

2004 Yamaha YZ450F

It’s fast, it’s furious, and it’s Motocross Action magazine’s 2003 Bike of the Year…

Keeping our ears to the dirt has been critically important over the years, and we’ve been picking up some seriously strong vibrations ever since we built the world’s first modern four-stroke motocrosser. Making improvements is how we continue to evolve a tighter, quicker, easier-to-deploy package.

Upgrades for 2004 consist of a rigid 48mm fork with new settings for a smooth, compliant and progressive feel. New, titanium footpegs and gripper-style seat cover material improve the crucial interface between man and machine — and man, what a machine: 222 pounds of high-tensile steel-framed, loam-launching, terrain-following, thrill-seeking motocross machine.

Yamaha-exclusive five titanium valve head (three intake, two exhaust) reduces reciprocating mass and helps make 11,000 rpm a regularly recurring event.

Bringing a 95mm piston to life against 12.5:1 compression can be hard work; YZ450F’s genius auto-decompression system and hot start lever make it quite easy.

The YZ450F’s high-revving counterbalanced 449cc liquid-cooled five-titanium valved 39mm Keihin-carbureted single is pure moto winning magic.

And four speeds are plenty, given the YZ450F’s seismic spread of power — and a heavy-duty clutch that gets the power to the ground consistently.


2004 Yamaha YZ450F Key Features




2004 Yamaha YZ450F – Specifications/Technical Details
USA MSRP Price: $6,299 USD
Canadian MSRP Price: See dealer for pricing in CDN

Length 85.5 in.

Height 51.3 in.

Width 32.6 in.

Weight 222 lbs.

Ground Clearance 14.6 in.

Wheelbase 58.5 in.

Seat Height 39.2 in.

Engine Liquid-cooled, 5-valve, DOHC, 4-stroke w/titanium valves

Displacement 449cc

Bore x Stroke 95 x 63.4mm

Compression Ratio 12.5:1

Fuel System 39mm Keihin FCR flat-slide w/throttle position sensor

Fuel Capacity 1.8 gal.

Ignition Digital CDI

Clutch Multi-plate wet clutch

Transmission 4-speed

Final Drive #520 chain

Brakes Front: 250mm floating disc
Rear: 245mm disc

Tires Front: 80/100-21 Dunlop
Rear: 110/90-19 Dunlop

Suspension Front: 48mm Kayaba inverted telescopic fork w/adj. compression & rebound damping; 11.8 in. travel
Rear: Kayaba single shock w/adj. preload, compression & rebound damping & separate hi/lo-speed compression adjuster; 12.4 in. travel

Colors Team Yamaha Blue/White

Suggested Starting Price shown does not include tax, title, or destination charge. Dealer prices may vary.


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