2002 Yamaha WR 426 F Technical Analysis & Specification Breakdown
At the heart of the 2002 Yamaha WR 426 F cross - motocross motorcycle, Yamaha pairs a 426 cc (26 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 95.0 x 60.1 mm (3.7 x 2.4 inches) with a 12.5:1 compression ratio.
On the scales, the WR 426 F measures 112.5 kg (248 lbs) dry. Rider ergonomics and chassis geometry center around a 998 mm (39.3 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,490 mm (58.7 in) wheelbase engineered for balanced agility and highway composure.
Within MotoLibrary's Yamaha archive, this model family spans 2 indexed model years from 2001 to 2002, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
998 mm (39.3 in)
Engine
Displacement426.0 ccm (25.99 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression12.5:1
Bore x Stroke95.0 x 60.1 mm (3.7 x 2.4 inches)
Valves/Cylinder5
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingLiquid
Chassis
Front Travel300 mm (11.8 inches)
Rear Travel315 mm (12.4 inches)
Wheelbase1490 mm (58.7 inches)
Ground Clearance375 mm (14.8 inches)
Wheels & Brakes
Front Tyre90/90-21
Rear Tyre130/90-18
Front BrakesSingle disc
Front Brake Ø250 mm (9.8 inches)
Rear BrakesSingle disc
Rear Brake Ø240 mm (9.4 inches)
Dimensions & Weight
Dry Weight112.5 kg (248.0 pounds)
Seat Height998 mm (39.3 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
