Motocross Bikes
2023Yamaha YZ125
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The 2023 Yamaha YZ125 is a lightweight two-stroke motocross bike designed for young and amateur riders seeking an affordable entry point into competitive racing. Known for its responsive power delivery and nimble handling, the liquid-cooled 125cc engine provides an ideal balance of performance and control for developing riders building fundamental skills.
- Capacity
- 125.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 86.2 kg
- Seat height
- 980 mm
- Power
- Not on record
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What’s new for the 2023 Yamaha YZ125
vs the 2022| Spec | 2022 | 2023 |
|---|---|---|
| Compression | 10.7:1 | 10.1:1 |
Other years
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross racing and aggressive trail riding, not for commuting, road use, or casual leisure riding.
- Built for
- A raw, high-revving 2-stroke racer that rewards precise clutch and throttle control with explosive acceleration and razor-sharp handling on dirt.
- Not ideal for
- Not for beginners, road riders, passengers, or anyone wanting comfort, storage, or long-distance capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 125.0 ccm
- Engine type
- Single, two-stroke
- Bore x stroke
- 54.0 x 54.5 mm
- Compression
- 10.1:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- CDI
- Lubrication system
- Premix
- Spark plugs
- NGK BR9EVX, NGK BR9EIX
- Power
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multiplate wet clutch
Dimensions & weight
- Wheelbase
- 1445 mm
- Overall length
- 2136 mm
- Overall width
- 826 mm
- Overall height
- 1295 mm
- Seat height
- 980 mm
- Dry weight
- 86.2 kg
- Wet weight
- 94.8 kg
- Fuel capacity
- 6.80 litres
- Ground clearance
- 366 mm
- Oil capacity
- 0.70 litres
Chassis & suspension
- Frame
- Aluminum semi-double cradle
- Front suspension
- KYB® Speed-Sensitive System inverted fork; fully adjustable
- Rear suspension
- KYB® single shock; fully adjustable
- Front wheel travel
- 300 mm
- Rear wheel travel
- 315 mm
- Rake (fork angle)
- 26.0°
- Trail
- 109 mm
- Fork tube size
- 48 mm
Brakes & wheels
- Front brakes
- Single disc. Hydraulic.
- Front brakes diameter
- 270 mm
- Rear brakes
- Single disc. Hydraulic.
- Rear brakes diameter
- 245 mm
- Front tyre
- 80/100-21
- Rear tyre
- 100/90-19
- Tire pressure front
- 15 PSI (1 Bar or 100 kPa)
- Tire pressure rear
- 15 PSI (1 Bar or 100 kPa)
Other
- Color options
- Team Yamaha Blue
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2002 | 2008 | 2015 | 2021 | 2023 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 124 cc | 124 cc | 125 cc | 125 cc | 125 cc | 125 cc |
| Dry weight | 88 kg | 86 kg | 86 kg | 86 kg | 86 kg | 86 kg |
| Seat height | 994 mm | 998 mm | 975 mm | 975 mm | 980 mm | 980 mm |
| Fuel capacity | 7.9 L | 7.9 L | 8 L | 8 L | 6.8 L | 6.8 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Yamaha YZ125?
The 2023 Yamaha YZ125 has a Capacity of 125.0 ccm (7.63 cubic inches).
How many gears does the Yamaha YZ125 have?
The 2023 Yamaha YZ125 has a Gearbox of 6-speed.
How much does the Yamaha YZ125 weigh?
The 2023 Yamaha YZ125 has a Dry weight of 86.2 kg (190.0 pounds).
Shop this bike
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The 2023 Yamaha YZ125 is an impressive dirt bike with powerful performance and excellent handling. Its 125cc engine delivers strong acceleration and top-end power, making it a competitive choice for motocross racing or off-road riding. The bike's lightweight chassis and smooth suspension provide agile handling and precise control, allowing riders to tackle rough terrain with confidence. With its stylish design and reliable build quality, the YZ125 is a fantastic option for anyone seeking a high-performance dirt bike.
In addition to its impressive performance, the 2023 Yamaha YZ125 boasts a range of features that make it a top choice for off-road enthusiasts. The bike's ergonomic design and comfortable seating position ensure a pleasant riding experience, while its durable construction and robust components guarantee long-lasting reliability. Whether you're a seasoned rider or a beginner looking to get into motocross, the YZ125's combination of power, handling, and quality make it an excellent option for anyone in the market for a high-performance dirt bike.
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