Motocross Bikes
2011Yamaha YZ125
35 fields on record
The 2011 Yamaha YZ125 is a lightweight two-stroke motocross bike designed for intermediate and amateur racers. Known for its responsive handling and aggressive power delivery, the liquid-cooled single-cylinder engine provides punchy performance ideal for competitive riding. Its aluminum frame and advanced suspension geometry make it a competitive choice in the 125cc motocross class.
- Capacity
- 124.0 ccm
- Engine
- Single single, two-stroke
- Gearbox
- 6-speed
- Wet weight
- 94.4 kg
- Seat height
- 998 mm
- Power
- 15.0 HP
What’s new for the 2011 Yamaha YZ125
vs the 2010| Spec | 2010 | 2011 |
|---|---|---|
| Engine capacity | 124.00 ccm (7.57 cubic inches) | 124.0 ccm (7.57 cubic inches) |
| Power | 15.0 HP (estimated - EU/UK A1-licence power-restricted range, ~11kW cap) | 15.0 HP |
| Weight | 94.3 kg (208.0 pounds) | 94.4 kg (208.1 pounds) |
| Fuel capacity | 7.94 litres (2.10 gallons) | 8.00 litres (2.11 US gallons) |
| Front brakes | Single disc | Single disc. Wave |
| Rear brakes | Single disc | Single disc. Wave |
| Wheelbase | 1,443 mm (56.8 inches) | 1443 mm (56.8 inches) |
Other years
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
- 124.0 ccm
- Power
- 15.0 HP
- Engine type
- Single single, two-stroke
- Power/weight ratio
- 0.1589 HP/kg
- Bore x stroke
- 54.0 x 54.5 mm
- Compression
- 8.6:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Ignition
- CDI
- Lubrication system
- Dry sump
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
Dimensions & weight
- Wheelbase
- 1443 mm
- Overall length
- 2136 mm
- Overall width
- 828 mm
- Overall height
- 1316 mm
- Seat height
- 998 mm
- Wet weight
- 94.4 kg
- Fuel capacity
- 8.00 litres
- Ground clearance
- 386 mm
- Oil capacity
- 0.70 litres
- Dry weight
- Not on record - add it
Chassis & suspension
- Frame
- Aluminium
- Front suspension
- Speed-sensitive system inverted fork
- Rear suspension
- Fully adjustable single shock
- Front wheel travel
- 300 mm
- Rear wheel travel
- 315 mm
Brakes & wheels
- Front brakes
- Single disc. Wave
- Front brakes diameter
- 250 mm
- Rear brakes
- Single disc. Wave
- Rear brakes diameter
- 245 mm
- Front tyre
- 80/100-M21
- Rear tyre
- 100/90-M19
Other
- Color options
- Team Yamaha Blue/White
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 | 2008 | 2011 | 2013 | 2018 | 2022 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 124.00 ccm (7.57 cubic inches) | 124.00 ccm (7.57 cubic inches) | 124.00 ccm (7.57 cubic inches) | 125.0 ccm (7.63 cubic inches) | 125.0 ccm (7.63 cubic inches) | 125 ccm (7.6 cubic inches) |
| Dry weight | 86.2 kg (190.0 pounds) | — | — | — | — | — |
| Seat height | 998 mm (39.3 inches) | 998 mm (39.3 inches) | 998 mm (39.3 inches) | 975 mm (38.4 inches) | 991 mm (39 inches) | 980 mm (38.6 inches) |
| Fuel capacity | 7.94 litres (2.10 gallons) | 7.95 litres (2.10 gallons) | 7.95 litres (2.10 gallons) | 8.00 litres (2.11 gallons) | 6.81 litres (1.80 US gallons) | 6.81 litres (1.80 US gallons) |
| Color options | Blue/white | Team Yamaha Blue/White | Team Yamaha Blue/White | Team Yamaha Blue | Team Yamaha Blue | — |
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 2011 Yamaha YZ125 has a Capacity of 124.0 ccm (7.57 cubic inches).
What engine power does the Yamaha YZ125 have?
The 2011 Yamaha YZ125 has a Power of 15.0 HP.
How many gears does the Yamaha YZ125 have?
The 2011 Yamaha YZ125 has a Gearbox of 6-speed.
How much does the Yamaha YZ125 weigh?
The 2011 Yamaha YZ125 has a Wet weight of 94.4 kg (208.1 pounds).
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