Built around Yamaha's enduro - offroad motorcycle platform, the 2019 Yamaha YZ250FX features a 250 cc (15.3 cu in) liquid-cooled single cylinder, four-stroke configuration. Internal engine geometry specifies a bore and stroke of 77.0 x 53.6 mm (3.0 x 2.1 inches) with a 13.5:1 compression ratio.
On the scales, the YZ250FX measures 112.9 kg (249 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 965 mm (38 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,466 mm (57.7 in) wheelbase engineered for balanced agility and highway composure. The 7.57-liter (2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 12 indexed model years from 2015 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
965 mm (38 in)
Engine
Displacement250.0 ccm (15.26 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsTitanium valves
Compression13.5:1
Bore x Stroke77.0 x 53.6 mm (3.0 x 2.1 inches)
Valves/Cylinder4
Fuel SystemInjection. Keihin® 44mm
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchMultiplate wet clutch
DrivelineO-ring chain
Chassis
Frame TypeBilateral beam frame
Rake26.3°
Trail114 mm (4.5 inches)
Front SuspensionKYB® spring-type fork with speed sensitive damping; fully adjustable
Front Travel310 mm (12.2 inches)
Rear SuspensionKYB® single shock; full adjustable
Rear Travel318 mm (12.5 inches)
Wheelbase1466 mm (57.7 inches)
Ground Clearance325 mm (12.8 inches)
Wheels & Brakes
Front Tyre90/90-21
Rear Tyre110/100-18
Front BrakesSingle disc. Hydraulic.
Front Brake Ø270 mm (10.6 inches)
Rear BrakesSingle disc. Hydraulic.
Rear Brake Ø245 mm (9.6 inches)
WheelsDunlop® AT81F tyres
Dimensions & Weight
Weight incl.112.9 kg (249.0 pounds)
Seat Height965 mm (38.0 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.
