Engineered by Yamaha for the naked motorcycle segment, the 2021 Yamaha MT-125 utilizes a 124.7 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 14.8 HP (10.8 kW) at 10,000 rpm while maximum torque reaches 11.5 Nm (8.5 lb-ft) at 8,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 118.7 HP per liter and a 2,000 rpm working window between peak torque (8,000 rpm) and peak power (10,000 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 140 kg (309 lbs) wet (curb), translating to a power-to-weight ratio of 0.11 HP/kg (9.46 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 10-liter (2.6 US gal) fuel tank paired with a rated consumption of 2.13 L/100 km provides an estimated theoretical range of roughly 469 km (291 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
118.7 HP/L
Power-to-Weight
0.11 HP/kg (9.46 kg/HP)
Power Band Window
8,000–10,000 rpm
Theoretical Range
~469 km (291 mi)
Engine
Displacement124.7 ccm (7.61 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power14.8 HP (10.8 kW)) @ 10000 RPM
Torque11.5 Nm (1.2 kgf-m or 8.5 ft.lbs) @ 8000 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)
ClutchAssist and slipper clutch
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 frame and aluminum swingarm
Rake26.0°
Trail95 mm (3.7 inches)
Front SuspensionUpside-down telescopic fork, 41 mm
Front Travel130 mm (5.1 inches)
Rear SuspensionSwingarm
Rear Travel114 mm (4.5 inches)
Wheelbase1355 mm (53.3 inches)
Ground Clearance140 mm (5.5 inches)
Wheels & Brakes
Front Tyre100/80-M17
Rear Tyre140/70-M17
Front BrakesSingle disc
Front Brake Ø292 mm (11.5 inches)
Rear BrakesSingle disc
Rear Brake Ø230 mm (9.1 inches)
WheelsY-spoke wheels
Dimensions & Weight
Weight incl.140.0 kg (308.6 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.
