Engineered by Yamaha for the scooter motorcycle segment, the 2015 Yamaha BWs 125 features a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 9 HP (6.6 kW) at 7,500 rpm while maximum torque reaches 9.6 Nm (7.1 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 72 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the BWs 125 measures 121 kg (267 lbs) wet (curb), translating to a power-to-weight ratio of 0.07 HP/kg (13.44 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,290 mm (50.8 in) wheelbase engineered for quick, flickable steering geometry. The 6-liter (1.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 10 indexed model years from 2010 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
72 HP/L
Power-to-Weight
0.07 HP/kg (13.44 kg/HP)
Power Band Window
6,000–7,500 rpm
Standover Height
780 mm (30.7 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power9.0 HP (6.6 kW)) @ 7500 RPM
Torque9.6 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 6000 RPM
Compression10.0:1
Bore x Stroke52.4 x 57.9 mm (2.1 x 2.3 inches)
Valves/Cylinder4
Fuel SystemInjection. Electronic Fuel Injection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionTCI
LubricationWet sump
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
Chassis
Frame TypeSteel
Front SuspensionTelescopic forks
Front Travel70 mm (2.8 inches)
Rear SuspensionUnit Swing
Rear Travel70 mm (2.8 inches)
Wheelbase1290 mm (50.8 inches)
Ground Clearance130 mm (5.1 inches)
Wheels & Brakes
Front Tyre120/70-12
Rear Tyre130/70-12
Front BrakesSingle disc. Hydraulic.
Front Brake Ø189 mm (7.4 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø150 mm (5.9 inches)
Dimensions & Weight
Weight incl.121.0 kg (266.8 pounds)
Seat Height780 mm (30.7 inches) If adjustable, lowest setting.
Overall Height1110 mm (43.7 inches)
Overall Length1910 mm (75.2 inches)
Overall Width715 mm (28.1 inches)
Fuel Capacity6.00 litres (1.59 US gallons)
Other
StarterElectric
Color OptionsTitan, white
Carrying CapacityUnderseat storage to carry a full-face helmet.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
