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M –55
Athens, Georgia
United States


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2003 Yamaha yz450f (The YZ)

Last updated Apr 1, 2008  

Photo of a 2003 Yamaha yz450f (The YZ)


2003 Yamaha YZ450F Specs

Type: 449cc, DOHC, 5-valve, liquid-cooled
four-stroke w/ titanium valves
Bore x stroke: 95x63.4mm/3.74x2.5in
Compression ratio: 12.5:1
Carburetion: 39mm Keihin FCR Flat-side w/TPS
Transmission: Constant mesh 4-speed,
multi-disc wet clutch
Starting: Kick

Frame: Semi double cradle
Front suspension: Telescopic fork, 11.81"/300mm travel;
coil spring/oil damper
Rear suspension: Swingarm link suspension, 12.4" travel;
coil spring/gas-oil damper;
separate hi/lo-spd compression adjustment
Rake: 27.2°
Trail: 4.65in/118mm
Front brake: 250mm floating disc
Rear brake: 245mm single disc
Front tire: 80/100-21 Dunlop 739
Rear tire: 110/90-19 Dunlop 739

Overall dimensions (LxWxH)- 85.5x32.6x51.3"/2172x828x1303mm
Seat height: 39.2"/996mm
Wheelbase: 58.5"/1486mm
Ground clearance: 14.6"/371mm
Fuel capacity: 1.8gallons/8.2L
Dry weight: 222lbs/101kg
Colors: Team Yamaha Blue/White