Yamaha WR 426 F - 2002 Specifications and Reviews

The 2002 Yamaha WR 426 F is a high-performance four-stroke dirt bike engineered for serious off-road riders and competition use. Its potent 426cc liquid-cooled engine delivers aggressive power delivery ideal for motocross racing and demanding trail riding. Known for excellent handling and durability, the WR 426 F established itself as a competitive alternative to traditional two-stroke machines.

2002
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General information

CategoryCross / motocross
Year2002
ModelYamaha WR 426 F

Engine and Transmission Specifications

Cooling systemLiquid
Fuel controlDOHC
Valves per cylinder5
Bore x stroke95.0 x 60.1 mm (3.7 x 2.4 inches)
Compression12.5:1
Stroke4
Engine typeSingle cylinder
Capacity:426.00 ccm (25.99 cubic inches)

Physical measures and capacities

Wheelbase1,490 mm (58.7 inches)
Ground clearance375 mm (14.8 inches)
Overall width835 mm (32.9 inches)
Overall length2,270 mm (89.4 inches)
Overall height1,303 mm (51.3 inches)
Seat height998 mm (39.3 inches) If adjustable, lowest setting.
Dry weight112.5 kg (248.0 pounds)
 
 

Yamaha WR 426 F dimensions and frame

Rear brakes diameter240 mm (9.4 inches)
Rear brakesSingle disc
Front brakes diameter250 mm (9.8 inches)
Front brakesSingle disc
Rear tyre dimensions130/90-18
Front tyre dimensions90/90-21
Rear suspension travel315 mm (12.4 inches)
Front suspension travel300 mm (11.8 inches)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track25%
City15%
Cornering60%
Daily Riding15%
Touring15%
Passenger5%

Rider Profile

Best ForThis is a demanding enduro-cross machine best suited to experienced off-road riders comfortable with a tall, aggressive, high-compression four-stroke dirt bike.
PurposeBuilt purely for competitive cross and motocross-style off-road riding, not for street use or commuting.
Rider FitThe tall 998mm seat height, lightweight 112.5kg dry chassis, and firm long-travel suspension demand good rider fitness, leg length, and off-road technique.
CharacterA raw, high-revving, five-valve single-cylinder thumper that rewards aggressive, committed riding with sharp agility and strong torque delivery off-road.
Not Ideal ForNot suitable for new riders, daily commuting, passengers, or anyone seeking a comfortable road-going or touring motorcycle.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2002 Yamaha WR 426 F Rider Ergonomics Assessment

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Feet:

At 998mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2002 Yamaha WR 426 F, with a moderate knee angle of around 90 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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