2003 Yamaha YZ450F

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2003 Yamaha YZ450F
2003 Yamaha YZ450F


– 2003 Yamaha YZ450F Review

2003 Yamaha YZ450F


Introducing the all-new, all-powerful, all-light YZ450F.

Just how revolutionary is it?

We’ve forged a totally new machine from the Dunlops up. With features like an all-new, liquid-cooled, 5-titanium valved 449cc single, with a completely redesigned automatic decompression system for easy-starting. An all-new 4-speed transmission and a beefed up clutch with larger, stronger plates.

Lighter weight frame and swingarm. Completely revised suspension, stronger brakes and more aggressive ergos and styling. And its incredible weight loss makes it harder-hitting and sharper handling than ever.


2003 Yamaha YZ450F Features and Benefits



2003 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 221 lbs.

Ground Clearance 14.6 in.

Wheelbase 58.5 in.

Seat Height 39.3 in.

Engine 449cc, liquid-cooled, 5-valve, DOHC, 4-stroke w/titanium valves

Displacement 449cc

Bore x Stroke 95 x 63.4mm

Compression Ratio 12.5:1

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

Fuel Capacity 1.8 gal.

Ignition Digital CDI

Transmission 4-speed w/multi-plate wet clutch

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: 46mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 11.8″ travel
Rear: Fully adjustable Kayaba single shock, 12.4″ travel; separate hi/lo speed compression adjustment

Team Yamaha Blue/White

Specifications are subject to change without notice, in accordance with national regulation and legislations. Suggested Starting Price shown does not include tax, title, or destination charge. Dealer prices may vary.

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