Segment: Enduro/Offroad
Production years: 2003, 2004
The 2003 YZ450F gets 48mm upside down forks with revised setting for a smooth, progressive feel and exceptional ground contact in the most demanding of scenarios. An all-titanium valve head allowing continued operation near the red line, a counterbalancer, revisions for other internals and more are making the engine of the 2003 YZ450F a high-performing lump for thrill-seekers.
Add in a heavy-duty clutch, a strong and stiff steel frame, sturdy wheels and a better auto-decompression system to up the ante even more and prove that this beast is really able to bring in trophy after trophy.
YAMAHA YZ450F 2003-2004
YAMAHA YZ450F 449
| engine specs | Type: | Liquid-cooled, 5-valve, DOHC, 4-stroke w/titanium valves | Displacement: | 449 cm3 | Bore X Stroke: | 3.7x2.5 in OR 94 mm | Compression Ratio: | 12.5:1 | Horsepower: | / KW(hp)/RPM | Torque: | 0/- lb-ft/RPM OR 0 Nm/RPM | Fuel System: | 39mm Keihin FCR flat-slide w/throttle position sensor |
|---|
| transmission specs | Gearbox: | 4-speed, manual | Clutch: | Multiplate wet clutch | Primary Drive: | - | Final Drive: | #520 O-ring chain |
|---|
| chassis specs | Frame: | Steel | Front Suspension: | 48mm Kayaba inverted telescopic fork w/adj. compression and rebound damping; 11.8 in. travel | Rear Suspension: | Kayaba single shock w/adj. preload, compression & rebound damping and separate hi/lo-speed compression adjuster; 12.4 in. travel | Front Brake: | 250mm floating disc | Rear Brake: | 245mm disc |
|---|
| dimension specs | Overall Length: | 85.5 in OR 2172 mm | Overall Width: | 32.6 in OR 828 mm | Seat Height: | 39.2 in OR 996 mm | Wheelbase: | 58.5 in OR 1486 mm | Ground Clearance: | 14.6 in OR 371 mm | Weight: | 222 lbs OR 101 kg | Fuel Capacity: | 1.8 gallons OR 6.8 L |
|---|
| tyres specs | Front: | 80/100-21 Dunlop | Rear: | 110/90-19 Dunlop |
|---|