Yamaha - Off Road Motorcycles - YZ125


2018 Off Road Motorcycles

Air Riders

To make it big in motocross you’ve got to put the hours in at the racetrack. So if you really are serious about getting to the top you’re going to need skill, fitness and determination – and the right race bike.

Which is where the YZ125 comes in. With its explosive engine power and ultra responsive aluminium chassis, this lightweight 125cc 2-stroke is a proven winner at the highest level.

This legendary dirt bike with its ultra responsive front and rear suspension systems for agile handling and fast cornering – and its sharp bodywork gives a cool factory look. Now all that’s missing from the package is…you.


•  Free-revving and compact 125cc 2-stroke engine
•  Ultra-light semi-double cradle aluminium frame
•  Race-winning power with lightweight handling
•  YZ-F type 48mm forks, separate air/oil function
•  YZ-F type Monocross rear suspension system
•  Modern bodywork for a lean and modern image
•  Fast-action clutch adjuster mechanism
•  Wide footrests for perfect controllability
•  2-stroke engine technology for easier maintenance
•  Easy to adjust 38mm Keihin carburettor
•  YRRD (Yamaha Rinaldi R and D) tuning kit available
•  Wide range of genuine accessories available


Yamaha - Off Road Motorcycles - YZ125

Sharp bodywork and bold graphics

The YZ125 2-stroke features modern bodywork and graphics for a light look. The fenders and fork protectors give a sharp image, while the side covers and seat cover highlight a fresh look.

Yamaha - Off Road Motorcycles - YZ125

48mm upside down forks

The 48mm upside down front forks are similar to the design used on our YZ-F 4-strokes, and feature a separate air/oil system that prevents air from entering the cartridge for more stable damping. The forks run with special YZ125-specific settings, and give even lighter and more agile handling characteristics.

Yamaha - Off Road Motorcycles - YZ125

Monocross rear suspension system

The YZ125 is equipped with a Monocross rear suspension system consisting of a modern swingarm, shock and linkage taken from the YZ-F 4-stroke bikes. This system offers outstanding shock absorption characteristics together with good traction for holeshot-winning performance.

Yamaha - Off Road Motorcycles - YZ125

Wide footrests and clutch adjuster

The YZ125 2-stroke benefits from a range of features that have come straight from our latest YZ-F 4-stroke models. The wide footrests give additional support for an perfect feeling of controllability during aggressive riding – and there’s also a clutch adjuster for easy tool-free adjustments to cable slack.

Yamaha - Off Road Motorcycles - YZ125

125cc 2-stroke engine

At the heart of this hard-charging lightweight is a free-revving 124cc liquid-cooled 2-stroke engine equipped with Yamaha’s renowned YPVS system for increased power. Driving through a close-ratio 6-speed transmission, this super-compact and easy-to-maintain engine can be tuned with our YRRD kit parts for even more winning performance.

Yamaha Off Road Motorcycles YZ125 Cyprus

High-agility ultra-light chassis

The compact 125cc 2-stroke engine is fitted into a semi-double cradle aluminium frame that is both light and strong, and which delivers a balance of rigidity that gives high levels of rider feedback. With a wet weight of just 94kg, the YZ125 is one of the easiest dirt bikes to flick through bends and power over washboard sections.

Technical specifications


Engine type
liquid-cooled, 2-stroke, Forward-inclined single cylinder, reed valve with YPVS
Bore x stroke
54.0 mm x 54.5 mm
Compression ratio
8.6 ~ 10.7 : 1
Maximum power
– (
Limited power version
– (
Maximum Torque
Lubrication system
Clutch Type
Wet, multiple-disc coil spring
Mikuni TMX38
Ignition system
Starter system
Transmission system
Constant Mesh, 6-speed
Final transmission


Semi double cradle
Front suspension system
Upside-down telescopic fork
Front travel
300 mm
Caster Angle
109 mm
Rear suspension system
Swingarm, (link suspension)
Rear Travel
315 mm
Front brake
Hydraulic single disc, Ø 250 mm
Rear brake
Hydraulic single disc, Ø 245 mm
Front tyre
80/100-21 51M
Rear tyre
100/90-19 57M


Overall length
2,137 mm
Overall width
825 mm
Overall height
1,295 mm
Seat height
975 mm
1,445 mm
Minimum ground clearance
363 mm
Wet weight (including full oil and fuel tank)
94 kg
Fuel tank capacity
8.0 L
Oil tank capacity
0.7 L


Yamaha Off Road Motorcycles YZ125 Cyprus - Racing Blue

Racing Blue