2021 Yamaha YZ125

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Light weight, but heavy on the fun factor. The 125cc liquid-cooled 2-stroke is the most fun you can have on two wheels.

Engine Type

125cc liquid-cooled 2-stroke; reed-valve inducted

Bore x Stroke

54.0mm x 54.5mm

Compression Ratio


Fuel Delivery

Mikuni® TMX 38




Constant-mesh 6-speed; multiplate wet clutch

Final Drive


Suspension / Front

KYB® Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel

Suspension / Rear

KYB® single shock; fully adjustable, 12.4-in travel

Brakes / Front

Hydraulic disc, 270mm

Brakes / Rear

Hydraulic disc, 245mm

Tires / Front

80/100-21 Dunlop® MX52

Tires / Rear

100/90-19 Dunlop® MX52

L x W x H

84.1 in x 32.6 in x 51.0 in

Seat Height

38.4 in


56.8 in

Rake (Caster Angle)



4.3 in

Ground Clearance

14.4 in

Fuel Capacity**

2.1 gal

Wet Weight***

207 lb

Modern Styling
The front fender, front number plate, radiator shrouds, side number plates, air box, rear fender, fork guards, as well as the rear brake disc protector, rear brake caliper protector and wider foot pegs offer modern, aggressive styling —just like the 4-strokes.

Lightweight Frame
A light aluminum frame houses a patented YPVS™-equipped ripper of an engine for an awesome power-to-weight ratio.

Race-Ready Features
Complete with an aluminum handlebar, titanium foot pegs and gripper seat, the YZ125 is ready to race out of the crate.

Ideal Balance
A pure motocross machine, the light and nimble YZ125 is the perfect choice for riders stepping up from the 85cc class.

Rider-Friendly Chassis
Ultra light weight means nimble handling and less fatigue.

270mm Front Brake
The large 270mm front disc brake coupled with high-performance pad material offers outstanding machine control and performance, plus exceptional stopping power and controllability.

We offer lifetime Engine Warranty.
No-Risk Extended Warranties.
50% Off Service Plans.
Employee pricing on all gear and accessories on the day of sale.
Financing for everyone.
Trade-ins accepted

Call Cycle Springs Powersports for all your Dirt Bike, Motocross, Enduro & MX Motorcycle questions! 727-771-1211

 Professional rider(s) on closed area.  Dress properly for your ride with a helmet, eye protection, and protective riding gear.  Do not drink and ride.  It is illegal and dangerous.  Specifications are subject to change.