2006Yamaha YZ125

★ 5.0

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The 2006 Yamaha YZ 125 is a liquid-cooled two-stroke motocross bike designed for amateur and intermediate riders seeking an affordable entry into competitive racing. Known for its responsive power delivery and lightweight agility, this 124cc machine excels in technical terrain and tight tracks. The reliable five-speed transmission and proven Yamaha engineering make it an ideal choice for aspiring motocross competitors.

Capacity: 124.0 ccm
Engine: Single, two-stroke
Gearbox: 6-speed
Dry weight: 86.0 kg
Seat height: 998 mm
Power: Not on record
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What’s new for the 2006 Yamaha YZ125

vs the 2005

Spec	2005	2006
Fuel capacity	7.90 litres (2.09 US gallons)	8.00 litres (2.11 US gallons)
Front suspension	48mm Kayaba inverted cartridge fork w/adjustable compression and rebound damping	Telescopic fork
Rear suspension	Kayaba single shock w/adjustable preload, compression and rebound damping and separate hi/lo-speed compression adjusters	Swinging arm (link-type monocross)
Wheelbase	—	1443 mm (56.8 inches)
Compression	8.7:1	8.6:1

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

Off-road & trail95%

Cornering90%

City riding10%

Daily riding10%

Touring5%

Two-up0%

Track85%

Best for: Built purely for motocross track racing and aggressive off-road riding, not for general transportation.
Built for: A high-strung, peaky, and razor-sharp machine that thrives on revs and rewards precise throttle and clutch control with explosive acceleration out of corners.
Not ideal for: This bike is not for beginners, commuters, passengers, or anyone seeking comfort, storage, or road-legal touring 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?

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Your height

Inseam (optional)

Units

At 998mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2006 Yamaha YZ125, with a moderate knee angle of around 90 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

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Full specifications

Engine

Capacity: 124.0 ccm
Engine type: Single, two-stroke
Compression: 8.6:1
Cooling system: Liquid
Fuel system: Carburettor
Starting: Kick
Ignition: CDI
Lubrication system: Premix
Power: Not on record - add it

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet, multiple-disc

Dimensions & weight

Wheelbase: 1443 mm
Overall length: 2139 mm
Overall width: 827 mm
Overall height: 1318 mm
Seat height: 998 mm
Dry weight: 86.0 kg
Wet weight: 94.3 kg
Fuel capacity: 8.00 litres
Ground clearance: 388 mm

Chassis & suspension

Front suspension: Telescopic fork
Rear suspension: Swinging arm (link-type monocross)
Front wheel travel: 300 mm
Rear wheel travel: 315 mm

Brakes & wheels

Front brakes: Single disc
Front brakes diameter: 250 mm
Rear brakes: Single disc
Rear brakes diameter: 245 mm
Front tyre: 80/90-M21
Rear tyre: 100/90-M19

Specs last verified against published sources: October 2026.

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	2006	2008	2015	2021	2027
Capacity	124 cc	124 cc	124 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	998 mm	975 mm	975 mm	980 mm
Fuel capacity	7.9 L	8 L	7.9 L	8 L	8 L	6.8 L