Yamaha WR450F (2001-02)

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The Yamaha WR 426F was produced from 2001-02 and features a four-stroke, single-cylinder, DOHC, 5-valve engine with a capacity of 449cc. It has a liquid cooling system and a compression ratio of 12.5:1. The bike is equipped with a 39mm Keihin FCR39H carburetor and digital CDI ignition, and is started by a kick. The maximum power output is 58.1 hp at 9000 rpm, with max torque of 49 Nm at 7000 rpm. The transmission has 5 speeds and the bike’s final drive is a chain. The front suspension is made up of 46mm Kayaba inverted telescopic forks, while the rear suspension is a fully adjustable Kayaba single shock with separate high and low-speed compression adjustment. The front and rear brakes are single 250mm and 245mm discs respectively. The bike has a wheelbase of 1490mm, a seat height of 960mm, and a ground clearance of 373mm. It has a dry weight of 114kg and an 8-liter fuel capacity. The bike is equipped with an 80/100-21 front tire and a 110/90-18 rear tire.

Technical specifications:

Make Model: Yamaha WR 426F

Year: 2001 – 02


Engine: Four stroke, single cylinder, DOHC, 5 valve
Capacity: 449 cc / 25.9 cu-in
Bore x Stroke: 95 x 60.1 mm
Cooling System: Lliquid cooled
Compression Ratio: 12.5:1
Induction: 39mm Keihin FCR39H carburetor
Ignition: Digital CDI
Starting: Kick
Max Power: 58.1 hp / 42.4 kW @ 9000 rpm
Max Torque: 49 Nm @ 7000 rpm
Transmission: 5 Speed
Final Drive: Chain
Front Suspension: 46mm Kayaba inverted telescopic forks compression and rebound damping adjustable
Front Wheel Travel: 300 mm / 11.8 in
Rear Suspension: Fully adjustable Kayaba single shock, 315mm wheel travel, separate high and low speed compression adjustment.

Rear Wheel Travel: 315 mm / 12.4 in
Front Brakes: Single 250mm disc
Rear Brakes: Single 245mm disc
Front Tyre: 80/100-21
Rear Tyre: 110/90-18
Rake: 27.2 degrees
Wheelbase: 1490 mm / 58.7 in
Seat height: 960 mm / 37.9 in
Ground Clearance: 373 mm / 14.7 in
Dry Weight: 114 kg / 251.3 lbs
Fuel Capacity: 8 Litres / 2.1 US gal

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