2005 Yamaha YZ 250 F Technical Analysis & Specification Breakdown
At the heart of the 2005 Yamaha YZ 250 F cross - motocross motorcycle, Yamaha features a 249 cc (15.2 cu in) liquid-cooled single cylinder, four-stroke configuration. Internal engine geometry specifies a bore and stroke of 66.4 x 72.0 mm (2.6 x 2.8 inches) with a 9.1:1 compression ratio.
Rider ergonomics and chassis geometry center around a 991 mm (39 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,486 mm (58.5 in) wheelbase engineered for balanced agility and highway composure. The 6.81-liter (1.8 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 5 indexed model years from 2002 to 2007, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
991 mm (39 in)
Engine
Displacement249.0 ccm (15.19 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, two-stroke
Compression9.1:1
Bore x Stroke66.4 x 72.0 mm (2.6 x 2.8 inches)
Valves/Cylinder1
Fuel SystemCarburettor
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Chassis
Rake27.1°
Front Suspension48mm Kayaba inverted cartridge fork w/adjustable compression and rebound damping
Front Travel300 mm (11.8 inches)
Rear SuspensionKayaba single shock w/adjustable preload, compression and rebound damping separate hi/lo-speed compression adjusters
Rear Travel315 mm (12.4 inches)
Wheelbase1486 mm (58.5 inches)
Ground Clearance381 mm (15.0 inches)
Wheels & Brakes
Front Tyre80/80-21
Rear Tyre110/90-19
Front BrakesSingle disc
Front Brake Ø250 mm (9.8 inches)
Rear BrakesSingle disc
Rear Brake Ø245 mm (9.6 inches)
Dimensions & Weight
Seat Height991 mm (39.0 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.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
