2023 Yamaha YZ125X

• Powerful New 125cc Two-Stroke Engine
  The new YZ125X's two-stroke engine represents an increase in power and usability over the 2022 model. 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.
• Tuned for GNCC® Competition
  The YZ125X utilizes 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.
• New Air Intake Design
  Updated intake design allows for a straighter, more efficient draw of air into the intake tract.
• Improved Fueling
  New high-precision Hitachi Astemo® Keihin PWK38S carburetor 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.
• Revised Close-Ratio Transmission
  Revised close-ratio six-speed transmission has wider transmission gear tooth width and new, optimized gear ratios for maximum performance.
• Narrow Exhaust Pipe
  The compact exhaust expansion chamber provides both horizontal and vertical clearance on tight, technical trails while still providing excellent exhaust efficiency.
• High-Capacity Radiator
  Large-capacity radiator with dark louvers deliver an aggressive look and maximum cooling efficiency for demanding racing conditions.

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