At the heart of the 2017 Yamaha YZ125X enduro - offroad motorcycle, Yamaha utilizes a 124 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke layout. Internal engine geometry specifies a bore and stroke of 54.0 x 54.5 mm (2.1 x 2.1 inches) with a 7.1:1 compression ratio.
On the scales, the YZ125X measures 93.5 kg (206 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 1,443 mm (56.8 in) wheelbase engineered for balanced agility and highway composure. The 8-liter (2.1 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 9 indexed model years from 2017 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsReed-valve-inducted
Compression7.1:1
Bore x Stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Fuel SystemCarburettor. Mikuni TMX 38
IgnitionCDI
LubricationPremix
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchO-ring chain
Chassis
Frame TypeSemi-double cradle aluminium frame
Rake26.0°
Trail109 mm (4.3 inches)
Front SuspensionSpeed-sensitive system inverted fork
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.
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.
