Engineered by Yamaha for the naked motorcycle segment, the 2021 Yamaha XSR 125 features a 125 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 19 HP (13.9 kW) at 10,000 rpm while maximum torque reaches 14.7 Nm (10.8 lb-ft) at 8,500 rpm. With a specific output of 152 HP per liter and a 1,500 rpm working window between peak torque (8,500 rpm) and peak power (10,000 rpm), the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
On the scales, the XSR 125 measures 134 kg (295 lbs) wet (curb), translating to a power-to-weight ratio of 0.14 HP/kg (7.05 kg per horsepower). Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,330 mm (52.4 in) wheelbase engineered for quick, flickable steering geometry. The 10.4-liter (2.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
152 HP/L
Power-to-Weight
0.14 HP/kg (7.05 kg/HP)
Power Band Window
8,500–10,000 rpm
Standover Height
810 mm (31.9 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power19.0 HP (13.9 kW)) @ 10000 RPM
Torque14.7 Nm (1.5 kgf-m or 10.8 ft.lbs) @ 8500 RPM
Compression11.6:1
Bore x Stroke58.0 x 58.7 mm (2.3 x 2.3 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionTCI (Transistor Control Ignition)
CoolingLiquid
Transmission
ClutchWet, multipate
Chassis
Frame TypeDeltabox
Front SuspensionTelescopic
Rear SuspensionLinked Monoshock
Wheelbase1330 mm (52.4 inches)
Ground Clearance170 mm (6.7 inches)
Wheels & Brakes
Front Tyre110/70-17
Rear Tyre140/70-17
Front BrakesSingle disc
Rear BrakesSingle disc
Dimensions & Weight
Weight incl.134.0 kg (295.4 pounds)
Seat Height810 mm (31.9 inches) If adjustable, lowest setting.
Overall Height1080 mm (42.5 inches)
Overall Length2007 mm (79.0 inches)
Overall Width804 mm (31.7 inches)
Fuel Capacity10.40 litres (2.75 US gallons)
Other
StarterElectric
Color OptionsMatte Green Authentic, Matte Silver Premium, Matte Black Elegance
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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
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.
