Yamaha YZ125
- Production years
- 2026
- Brand
- Yamaha
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YAMAHA YZ125 (2025-Present)
Selected year: 2026
Technical specifications
- Engine capacity
- 125 cm³
- Power
- 15 hp (11 kW)
- Wet weight
- 96.2 kg
- Seat height
- 980 mm
Overview
The Yamaha YZ125 is a motocross bike produced for 2026. Its liquid-cooled, 125.0 cm³ single-cylinder two-stroke makes 15 hp (11 kW), and it weighs 96.2 kg wet or 86.2 kg dry.
At 980 mm, the seat is high, while 365 mm of ground clearance helps keep the bike clear of uneven terrain. Fully adjustable KYB® suspension offers 300 mm of front wheel travel and 315 mm at the rear; the 6.80-liter fuel tank and premix lubrication are also part of its setup.
Specifications
Engine
Engine
- Bore x stroke
- 54.0 x 54.5 mm
- Engine capacity
- 125 cm³
- Compression ratio
- 10.1:1
- Cooling system
- Liquid
- Engine type
- Single, two-stroke
- Fuel system
- Carburettor
- Ignition
- CDI
- Lubrication system
- Premix
- Oil capacity
- 0.7 L
- Starting
- Kick
- Valves per cylinder
- 1
Performance and transmission
Performance and transmission
- Power
- 15 hp (11 kW)
- Power weight ratio
- 0.1740 HP/kg (dry)
- Clutch
- Multiplate wet clutch
- Final drive
- Chain
- Gearbox
- Manual 6-speed
- Transmission type
- Manual
Dimensions and weight
Dimensions and weight
- Dry weight
- 86.2 kg
- Fuel capacity
- 6.8 L
- Ground clearance
- 365 mm
- Overall height
- 1,295 mm
- Overall length
- 2,135 mm
- Overall width
- 825 mm
- Seat height
- 980 mm
- Wet weight
- 96.2 kg
- Wheelbase
- 1,445 mm
Chassis and suspension
Chassis and suspension
- Frame
- Aluminum semi-double cradle
- Front suspension
- KYB® Speed-Sensitive System inverted fork; fully adjustable
- Front wheel travel
- 300 mm
- Rake
- 26.0°
- Rear suspension
- KYB® single shock; fully adjustable
- Rear wheel travel
- 315 mm
- Trail
- 109 mm
Brakes and wheels
Brakes and wheels
- Front brakes
- Single disc. Hydraulic.
- Front brakes diameter
- 270 mm
- Front tyre
- 80/100-21
- Rear brakes
- Single disc. Hydraulic.
- Rear brakes diameter
- 245 mm
- Rear tyre
- 100/90-19
Pros and cons
Advantages
Adjustable suspension
Fully adjustable front and rear suspension lets riders tune the setup to suit the track.
Long suspension travel
The 300 mm front and 315 mm rear travel provide room to absorb substantial bumps and landings.
Low wet weight
At 96.2 kg wet, the bike has relatively little mass to manage when changing direction or picking it up.
Things to consider
High seat
The 980 mm seat can make it harder for shorter riders to put a foot down securely.
Kick start only
Starting requires using the kickstarter, with no electric-start backup.
Premix lubrication
Premix lubrication means fuel and oil need to be mixed rather than relying on a separate oil-injection system.
Rider fit
Rider fit calculator
Calculated in your browser
Don't know it? Leave this empty and we'll estimate it from your height.
Estimated from your height: 79 cm
How to measure
Stand barefoot with your back to a wall. Hold a book firmly between your legs, then measure from the floor to the top edge of the book.
Estimated ground reach
Ground reach may be difficult
This seat may feel tall. A lower seat or suspension setup could make stops easier.
Seat height
980 mm
Approx. loaded height
950 mm
Estimate assumes about 30 mm of suspension sag. Seat width, footwear, luggage and suspension settings can change real reach. Always sit on the motorcycle before buying.
Fuel range calculator
Enter your expected fuel consumption to estimate the distance on a full tank, with or without a fuel reserve.
Tank 6.8 L at 6 L/100 km
Lower consumption = longer range.
Estimated range
113 km
With 10% reserve
102 km
This is a planning estimate, not a measured result. Speed, route, weather, load and riding style can change real consumption.
FAQ
What engine does the 2026 Yamaha YZ125 have?
It has a liquid-cooled, 125.0 cm³ single-cylinder two-stroke engine with a carburetor.
How much power does the Yamaha YZ125 make?
It makes 15 hp (11 kW).
How tall is the Yamaha YZ125 seat?
The seat height is 980 mm.
Does the Yamaha YZ125 have electric start?
No, it uses kick start.
