Built around Yamaha's naked motorcycle platform, the 2017 Yamaha MT-125 features a 124.7 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 15 HP (10.9 kW) at 9,000 rpm while maximum torque reaches 12.4 Nm (9.1 lb-ft) at 6,900 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 120.3 HP per liter and a 2,100 rpm working window between peak torque (6,900 rpm) and peak power (9,000 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the MT-125 measures 138 kg (304 lbs) wet (curb), translating to a power-to-weight ratio of 0.11 HP/kg (9.2 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 1,355 mm (53.3 in) wheelbase engineered for quick, flickable steering geometry. The 11.5-liter (3 US gal) fuel tank paired with a rated consumption of 2.13 L/100 km provides an estimated theoretical range of roughly 540 km (336 miles) between fill-ups.
Within MotoLibrary's Yamaha archive, this model family spans 9 indexed model years from 2015 to 2024, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
120.3 HP/L
Power-to-Weight
0.11 HP/kg (9.2 kg/HP)
Power Band Window
6,900–9,000 rpm
Theoretical Range
~540 km (336 mi)
Engine
Displacement124.7 ccm (7.61 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power15.0 HP (10.9 kW)) @ 9000 RPM
Torque12.4 Nm (1.3 kgf-m or 9.1 ft.lbs) @ 6900 RPM
Compression11.2:1
Bore x Stroke52.0 x 58.6 mm (2.0 x 2.3 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionTCI
LubricationWet sump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet, multiple-disc coil spring
Performance
Fuel Consumption2.13 litres/100 km (46.9 km/l or 110.43 mpg)
Greenhouse Gases49.4 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeSteel Deltabox
Rake25.0°
Trail89 mm (3.5 inches)
Front SuspensionUpside-down telescopic fork, 41 mm
Front Travel137 mm (5.4 inches)
Rear SuspensionLinked monoshock with spring preload adjustment
Rear Travel130 mm (5.1 inches)
Wheelbase1355 mm (53.3 inches)
Ground Clearance140 mm (5.5 inches)
Wheels & Brakes
Front Tyre100/80-M17
Rear Tyre130/70-M17
Front BrakesSingle disc. Optional ABS.
Front Brake Ø292 mm (11.5 inches)
Rear BrakesSingle disc. Optional ABS.
Rear Brake Ø230 mm (9.1 inches)
WheelsY-spoke wheels
Dimensions & Weight
Weight incl.138.0 kg (304.2 pounds)
Seat Height810 mm (31.9 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.
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.
