Segment: Enduro/Offroad
Production years: 2002, 2003
The 2002 YZ450F is the top-drawer dirt bike in Yamaha's line-up , and it comes with a new 449cc engine, with liquid cooling and a 5-titanium-valve architecture, and redesigned automatic decompression for easier starts. The clutch is also new, and sports bigger plates for a more resilient performance under stress, while the all-new 4-speed transmission was revised for more explosive power deployment, one thing skilled riders really appreciate.
A new suspension was installed, alongside stronger brakes and lighter frame and swingarm, all for razor-sharp handling regardless of how difficult the terrain might be.
YAMAHA YZ450F 2002-2003
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 |
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| transmission specs | Gearbox: | 4-speed, manual | Clutch: | Multiplate wet clutch | Primary Drive: | - | Final Drive: | #520 O-ring chain |
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| chassis specs | Frame: | Steel | Front Suspension: | 46mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 11.8" travel | Rear Suspension: | Fully adjustable Kayaba single shock, 12.4" travel; separate hi/lo speed compression adjustment | Front Brake: | 250mm floating disc | Rear Brake: | 245mm disc |
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| dimension specs | Overall Length: | 85.5 in OR 2172 mm | Overall Width: | 32.6 in OR 828 mm | Seat Height: | 39.3 in OR 998 mm | Wheelbase: | 58.5 in OR 1486 mm | Ground Clearance: | 14.6 in OR 371 mm | Weight: | 220 lbs OR 100 kg | Fuel Capacity: | 1.8 gallons OR 6.8 L |
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| tyres specs | Front: | 80/100-21 Dunlop | Rear: | 110/90-19 Dunlop |
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