What category is the 2005 Yamaha YZ 125?

The 2005 Yamaha YZ 125 has a Category of Cross / motocross.

What is the engine size of the 2005 Yamaha YZ 125?

The 2005 Yamaha YZ 125 has a Capacity: of 124.00 ccm (7.57 cubic inches).

What type of engine does the 2005 Yamaha YZ 125 have?

The 2005 Yamaha YZ 125 has a Engine type of Single cylinder.

Is the 2005 Yamaha YZ 125 air cooled or liquid cooled?

The 2005 Yamaha YZ 125 has a Cooling system of Liquid.

How many gears does the 2005 Yamaha YZ 125 have?

The 2005 Yamaha YZ 125 has a Gearbox of 5-speed.

What is the seat height of the 2005 Yamaha YZ 125?

The 2005 Yamaha YZ 125 has a Seat height of 993 mm (39.1 inches) If adjustable, lowest setting..

Yamaha YZ 125 - 2005 Specifications and Reviews

Name: 2005 Yamaha YZ 125
Brand: Yamaha
Rating: 5 (3 reviews)

The 2005 Yamaha YZ 125 is a lightweight two-stroke motocross bike designed for amateur and intermediate riders entering competitive racing. Known for its aggressive power delivery and nimble handling, it excels in tight technical sections and is considered a stepping stone between 85cc and larger displacement machines. Its compact frame and manageable seat height make it accessible for younger and smaller riders.

⇄ Compare against another bike 📅 All Years

2005

❮❯

Add/Upload pictures for this motorcycle

General information
Category	Cross / motocross
Year	2005
Model	Yamaha YZ 125
Engine and Transmission Specifications
Transmission typefinal drive	Chain
Gearbox	5-speed
Cooling system	Liquid
Valves per cylinder	1
Fuel system	Carburettor
Bore x stroke	54.0 x 54.5 mm (2.1 x 2.1 inches)
Compression	8.7:1
Stroke	2
Engine type	Single cylinder
Capacity:	124.00 ccm (7.57 cubic inches)
Physical measures and capacities
Wheelbase	59 mm (2.3 inches)
Ground clearance	401 mm (15.8 inches)
Overall width	828 mm (32.6 inches)
Overall length	2,134 mm (84.0 inches)
Overall height	1,318 mm (51.9 inches)
Seat height	993 mm (39.1 inches) If adjustable, lowest setting.

Yamaha YZ 125 dimensions and frame
Rear brakes diameter	245 mm (9.6 inches)
Rear brakes	Single disc
Front brakes diameter	250 mm (9.8 inches)
Front brakes	Single disc
Rear tyre dimensions	100/90-19
Front tyre dimensions	80/80-21
Rear suspension travel	315 mm (12.4 inches)
Rear suspension	Kayaba single shock w/adjustable preload, compression and rebound damping and separate hi/lo-speed compression adjusters
Front suspension travel	300 mm (11.8 inches)
Front suspension	48mm Kayaba inverted cartridge fork w/adjustable compression and rebound damping
Rake (fork angle)	27.1°
Speed and acceleration
Color options	Team Yamaha Blue/White
Fuel capacity	7.94 litres (2.10 gallons)

Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track85%

City10%

Cornering90%

Daily Riding10%

Touring5%

Passenger0%

Rider Profile

Best For	This is a competition-focused motocross machine best suited to intermediate and expert off-road riders who understand two-stroke power delivery and clutch management.
Purpose	Built purely for motocross track racing and aggressive off-road riding, not for general transportation.
Rider Fit	Its light dry weight and tall seat height reward an active, standing riding style but demand good fitness, strength, and leg length to control on rough terrain.
Character	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.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2005 Yamaha YZ 125 Rider Ergonomics Assessment

Your height

Inseam (optional)

Units

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 993mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2005 Yamaha YZ 125, with a moderate knee angle of around 90 degrees and an upright riding position.

Data quality: estimated (wheelbase estimated from this category's typical bike, not this model's own spec). Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

Find bikes that fit your height →