$4,999.00 – Stock Number: Y21144

Wichita, KS

Return to your roots!

The YZ125 is the perfect transition from a YZ85 to a YZ250F! One ride and you will be amazed at the light handling and the simple fun the YZ125 provides. Plus, YZ 2-strokes are easier and cost less to maintain … A win-win for all the true moto fans out there.


Bore x Stroke 54.0 x 54.5mm
Compression Ratio 8.6~10.7:1
Engine 124cc, liquid-cooled, 2-stroke, reed-valve inducted
Fuel Capacity 2.1 gal
Fuel Delivery Mikuni® TMX 38
Brake Front Hydraulic single disc brake, 250mm
Brake Rear Hydraulic single disc brake, 245mm
Suspension Front Speed-sensitive system inverted fork; fully adjustable, 11.8-in travel
Suspension Rear Fully adjustable single shock; 12.4-in travel
Tires Front 80/100-21
Tires Rear 100/90-19
Ground Clearance 15.2 in
Height 51.8 in
Length 84.1 in
Seat Height 39.3 in
Wet Weight 207 lb
Wheelbase 56.8 in
Width 32.6 in
Final Drive Chain Drive
Ignition CDI
Transmission Constant-mesh 6-speed; multiplate wet clutch
General Information
Warranty 30 Day (Limited Factory Warranty)



  • A light aluminum frame housing an amazingly light and compact engine results in an awesome power-to-weight ratio.
  • A pure motocross machine, the light and nimble YZ125 is the perfect choice for riders stepping up from the 85cc class.
  • Chassis/Suspension – A carefully engineered, advanced aluminum frame and swingarm give the YZ125 the best handling in its class.
  • Chassis/Suspension – Premium Dunlop® knobbies offer race-spec traction and wear.
  • Chassis/Suspension – Rear, fully adjustable KYB® shock features a super-light titanium shock spring and reduced-friction Kashima coating of internals. 12.4 inches of travel, separate adjusters for high- and low-speed compression damping, and a full lock oil rebound system for increased comfort all add up to fantastic rear wheel control and a sweet ride.
  • Chassis/Suspension – Removable aluminum rear subframe is constructed of square-section tubing for reduced weight.
  • Chassis/Suspension – Speed-Sensitive System 48mm KYB® fork; damping force is controlled by piston speed which provides a smoother, more precise ride with 11.8 inches of travel.
  • Chassis/Suspension – Tapered rear wheel spacers ease sliding the rear wheel into place for quicker tire changes.
  • Chassis/Suspension – YZ250F-style front-brake caliper and wave-style front and rear discs minimize unsprung weight and provide excellent stopping power.
  • Durable, comfortable handlebar grips.
  • Engine – Amazingly compact 124cc reed-valve-inducted two-stroke helps produce an awesome power-to-weight ratio.
  • Engine – Digital CDI ignition system delivers precise spark and monitors engine speed to ensure optimal timing for faster, stronger response during hard acceleration.
  • Engine – Large-capacity radiator features a 10-row core with four louvers to deliver maximum cooling efficiency at all performance levels.
  • Engine – Patented YPVS® power-valve system combines crisp, hard-hitting bottom-end acceleration with strong midrange and eye-opening top-end.
  • Engine – Primary kickstarting ensures easy restarts in any gear.
  • Engine – Reed-valve spacer improves acceleration across the entire powerband.
  • Engine – Six-speed, close-ratio transmission optimizes gear ratios for maximum performance.
  • Engine – Trick, works-style clutch lever features race-spec barrel adjuster for on-the-fly adjustability.
  • Premium drive chain has gold-colored plates for outstanding looks.
  • Repackable exhaust silencer.
  • Special-design “gripper” type seat and fuel tank, forward-canted steering crown and low aluminum handlebar all help create greater freedom of movement and more comfortable ergonomics for riders.
  • The YZ125 is ready to race out of the crate, complete with an aluminum handlebar, titanium foot pegs, and gripper seat.
  • Ultra lightweight means nimble handling with less fatigue.
  • Use of light box-head bolts throughout the chassis eases maintenance while reducing weight for increased performance.
  • Wide, cleated, folding titanium foot pegs are lightweight and provide excellent comfort, grip and ground clearance.
  • Wide-diameter fuel tank cap for easier refueling.