Built around Yamaha's enduro - offroad motorcycle platform, the 2020 Yamaha YZ250X pairs a 249 cc (15.2 cu in) liquid-cooled single cylinder, two-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 66.0 x 72.0 mm (2.6 x 2.8 inches) with a 9.4:1 compression ratio.
On the scales, the YZ250X measures 103.9 kg (229 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 970 mm (38.2 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 7.95-liter (2.1 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 11 indexed model years from 2016 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
970 mm (38.2 in)
Engine
Displacement249.0 ccm (15.19 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsReed-valve inducted
Compression9.4:1
Bore x Stroke66.0 x 72.0 mm (2.6 x 2.8 inches)
Fuel SystemInjection. Keihin® PWK38S
IgnitionCDI
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet multi-disc
DrivelineO-ring chain
Chassis
Rake27.7°
Trail122 mm (4.8 inches)
Front SuspensionKYB® Speed-Sensitive System inverted fork; fully adjustable
Front Travel300 mm (11.8 inches)
Rear SuspensionKYB® single shock; fully adjustable
Rear Travel315 mm (12.4 inches)
Wheelbase1486 mm (58.5 inches)
Ground Clearance361 mm (14.2 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.103.9 kg (229.0 pounds)
Seat Height970 mm (38.2 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.
