2023 Yamaha MT-125 Specifications

Name: 2023 Yamaha MT-125
Brand: Yamaha

Naked bike • Specs last verified 13 July 2026

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2023 Yamaha MT-125 Overview

For 2023, Yamaha offers the MT-125 as a naked bike motorcycle with 124.7 cc on tap. The 2023 Yamaha MT-125 is built around a Single cylinder, four-stroke engine running Single Overhead Cams (SOHC) valve actuation, a compression ratio of 11.2:1. Internally, bore and stroke are 52 x 58.6 mm. Out on the road, the MT-125 delivers 11.5 Nm @ 8000 Revolutions of torque. In everyday use, the 2023 MT-125 tips the scales at 142 kg, carries a 11-litre fuel tank, offers a seat height of 810 mm and spans a 1325 mm wheelbase. That's roughly 63.9 kg lighter than the average naked bike motorcycle in our database. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2023 Yamaha MT-125 spec sheet below.

2023 MT-125 - Pros & Cons

Strengths

Fuel injection: No choke, no jetting, no altitude compensation to think about - fuel injection just works across a wider range of conditions than carburetion.

Considerations

Modest fuel capacity: A 11-litre tank keeps things light but means budgeting for more frequent fuel stops on any longer ride.
Chain final drive upkeep: A chain drivetrain is the most common setup in its class, but it's also the one that demands the most regular hands-on maintenance.

Wear Points & Servicing Notes

Fuelling & injector care

Fuelling on the MT-125 comes from fuel injection. Cold starts and throttle response stay consistent across altitude and temperature, the main practical edge over a carbureted equivalent.

Valve clearance checks

Valve clearances on Single Overhead Cams (SOHC)-equipped engines like the MT-125's drift slowly with mileage rather than failing suddenly - sticking to the service interval keeps it a non-issue.

Brake disc and pad wear

Single disc up front provides the primary stopping power; inspect disc thickness and pad wear at each tyre change to catch scoring before it becomes a rotor replacement.

Suspension condition on used examples

Suspension duties are handled by Upside-down telescopic fork, 41 mm up front and Swingarm at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.

Final drive maintenance

Chain final drive on the MT-125 means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.

Frame & chassis check

The Steel deltabox with aluminum swingarm chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.

MT-125 - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 2023 Yamaha MT-125 should cover the same ground every time: service history, chain and sprocket condition, and any oil seepage around the casings. Start it from cold if you can - a well-kept MT-125 settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for a MT-125's engine - keep to the manufacturer's interval rather than stretching it. The sump holds 1.10 litres, so budget for that volume of quality motorcycle-specific engine oil. Use the viscosity grade the manual specifies, not whatever's on sale.

Fuel system care

Injector systems like the MT-125's hold up well with basic care - decent fuel, an occasional cleaner additive, and draining old fuel before any layup longer than three months.

Valve clearance service

There's no reliable seat-of-the-pants way to tell if a MT-125's valve clearances are in spec - a light top-end tick is the only real warning sign, and by then some wear has already happened. Service records are the only proof.

2023 Yamaha MT-125 - Frequently Asked Questions

What engine does the 2023 Yamaha MT-125 have?

The 2023 Yamaha MT-125 uses a Single cylinder, four-stroke engine with 124.7 cc of displacement.

How much does the 2023 Yamaha MT-125 weigh?

The 2023 Yamaha MT-125 weighs 142 kg. This is the manufacturer's wet figure.

How much power does the 2023 Yamaha MT-125 make?

The 2023 Yamaha MT-125 produces 11.5 Nm @ 8000 Revolutions of torque.

What is the fuel tank capacity of the 2023 Yamaha MT-125?

The 2023 Yamaha MT-125 has a 11-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 183-220 km between stops.

Is the 2023 Yamaha MT-125 suitable for shorter riders?

The 2023 Yamaha MT-125 has a seat height of 810 mm. This is a moderate seat height that suits a wide range of rider heights.

What brakes does the 2023 Yamaha MT-125 have?

The 2023 Yamaha MT-125 uses Single disc at the front and Single disc at the rear.

What tyre sizes does the 2023 Yamaha MT-125 use?

The front tyre size on the 2023 Yamaha MT-125 is 100/80-M17.

How much oil does the 2023 Yamaha MT-125 take?

The 2023 Yamaha MT-125 takes 1.10 litres of engine oil at a full oil and filter change. Always verify against the dipstick or sight glass after filling.

Yamaha MT-125 Spec Evolution

The Yamaha MT-125 was produced across 8 model years (2015-2023). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	2015	2016	2017	2018	2019	2021	2022	2023
Wet Weight	138.0 kg / 304.2 lbs	138.0 kg / 304.2 lbs	138.0 kg / 304.2 lbs	140.0 kg / 308.6 lbs	140.0 kg / 308.6 lbs	140.0 kg / 308.6 lbs	142.0 kg / 313.1 lbs	142.0 kg / 313.1 lbs
Fuel Capacity	11.50 litres / 3.04 gallons	11.50 litres / 3.04 gallons	11.50 litres / 3.04 gallons	11.50 litres / 3.04 gallons	11.50 litres / 3.04 US gallons	10.00 litres / 2.64 US gallons	11.00 litres / 2.91 US gallons	11.00 litres / 2.91 US gallons
Oil Capacity (Quarts)	0.08 quarts	0.08 quarts	0.08 quarts	0.08 quarts	1.27 US quarts	1.16 US quarts	1.16 US quarts	1.16 US quarts
Oil Capacity (l)	1.20 litres	1.20 litres	1.20 litres	1.20 litres	1.20 litres	1.10 litres	1.10 litres	1.10 litres
Displacement (cc)	124.70 cc	124.70 cc	124.70 cc	124.70 cc	124.7 cc	124.7 cc	124.7 cc	124.7 cc
Comments	-	ABS adds 2 kg.	ABS adds 2 kg.	-	-	-	-	Traction control.
CO2	-	-	49.4 CO2 g/km. (CO2 - Carbon dioxide emission)	49.4 CO2 g/km. (CO2 - Carbon dioxide emission)	49.4 CO2 g/km. (CO2 - Carbon dioxide emission)	49.4 CO2 g/km. (CO2 - Carbon dioxide emission)	48.7 CO2 g/km. (CO2 - Carbon dioxide emission)	48.7 CO2 g/km. (CO2 - Carbon dioxide emission)
Frame Type	Steel Deltabox	Steel Deltabox	Steel Deltabox	Steel Deltabox	Steel Deltabox	Steel deltabox frame and aluminum swingarm	Steel deltabox frame and aluminum swingarm	Steel deltabox with aluminum swingarm

Key Specifications

Engine

Single cylinder, four-stroke

Power

Not published by manufacturer

Torque

11.5 Nm (1.2 kgf-m or 8.5 ft.lbs) @ 8000 Revolutions

Top Speed

Not published by manufacturer

Weight

142.0 kg / 313.1 lbs

Fuel Capacity

11.00 litres / 2.91 US gallons

Full 2023 Yamaha MT-125 Specifications

Comments Traction control.

Colours Tech Black, Cyan Storm, Icon Blue

Ground Clearance (mm) 140 mm

Ground Clearance (in.) 5.5 inches

Seat Height 810 mm / 31.9 in.

Wheelbase 1325 mm / 52.2 in.

Height 1065 mm / 41.9 in.

Length 1960 mm / 77.2 in.

Width 800 mm / 31.5 in.

Oil Capacity (Quarts) 1.16 US quarts

Oil Capacity (l) 1.10 litres

Fuel Capacity 11.00 litres / 2.91 US gallons

Wet Weight 142.0 kg / 313.1 lbs

Max Torque 11.5 Nm (1.2 kgf-m or 8.5 ft.lbs) @ 8000 Revolutions

Fuel Control Single Overhead Cams (SOHC)

Engine Type Single cylinder, four-stroke

Displacement (ci) 7.61 cubic inches

Displacement (cc) 124.7 cc

CO2 48.7 CO2 g/km. (CO2 - Carbon dioxide emission)

Bore x Stroke (mm) 52.0 x 58.6 mm

Bore x Stroke (in,) 2.0 x 2.3 inches

Fuel System Injection

Compression Ratio 11.2:1

Emissions Euro 5

Engine Lubrication Wet sump

Fuel Consumption 2.10 litres/100 km (47.6 km/l or 112.01 mpg)

Ignition TCI

Starter Electric

Valve System 4

Clutch Assist and slipper clutch

Final Drive Chain (final drive)

Gearbox 6-speed

Frame Type Steel deltabox with aluminum swingarm

Suspension - Front Upside-down telescopic fork, 41 mm

Suspension - Rear Swingarm

Rake 26.0°

Trail 95 mm / 3.7 in.

Wheel Travel - Front 130 mm / 5.1 in.

Wheel Travel - Rear 110 mm / 4.3 in.

Instrumentation 5’’ TFT display with smartphone connectivity

Lighting system Dual eye positions lights; LED headlight

Brakes - Front Single disc

Brakes - Rear Single disc

Rims Y-spoke wheels

Tyres - Front 100/80-M17

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.