The all-new 2023 YZ125X is ready to rip with a powerful, completely redesigned 125cc two stroke engine, revised suspension damping, new lightweight braking system, improved ergos and a
sharp new look. The ultimate step-up to full-size off-road performance.
Nearly every functional part of the engine is new — from the cylinder body, cylinder head, piston, piston pin, connecting rod, crankcase and expansion chamber, to a revised cylinder port shape and updated cylinder port timing. It’s a change that is immediately apparent at the first crack of the throttle and throughout the entire rpm range.
The YZ125X runs a revised compression ratio, revised YPVS timing and a model-specific digital CDI unit compared to its motocross sibling — all focused on creating a broad, usable power delivery
specifically suited to cross country and enduro style competition. A revised close-ratio six-speed transmission has wider transmission gear tooth width and new, optimised gear ratios for maximum
New high-precision Hitachi Astemo® Keihin PWK38S carburettor features a power jet, throttle position sensor and 3D-map-controlled CDI unit for precise ignition timing. The result is clean, crisp throttle response, superior rideability and excellent over-rev character.
A race-proven, highly developed aluminium semi double cradle frame is engineered to provide the perfect balance of rigidity and flex for competition ready handling character and composure. Removable aluminium rear subframe is constructed of square section tubing for reduced weight.
An updated high performance braking system features larger front pistons, a more rigid caliper and a redesigned 270mm front rotor with a 30% increase in pad contact area, all combining to provide exceptional braking power and feel. The redesigned rear rotor maintains the same braking power while dropping outer diameter from 245mm to 240mm, reducing unsprung weight with no compromise on performance.
The all-new YZ125X also features advanced KYB suspension, gripper seat and narrow fuel tank combined with a tapered aluminium handlebar and adjustable mounts, slick blue Excel rims and newly sized high performance Dunlop Geomax MX33 tyres for improved cornering traction, stability and feel.
Other features include an 18-inch rear wheel, larger rear sprocket, side stand, sealed O-ring chain, new headlight, reserve fuel petcock, and newly adopted scraper between the fork’s dust and oil seal, all adding up to exceptional off-road performance.