2022 Yamaha YZ125X

Key Features ​

• YZ125 two-stroke engine with Yamaha Power Valve System (YPVS) 
• Model-specific CDI unit 
• Racing intake system 
• Ultra-lightweight YZ125-spec frame 
• Industry-leading, XC-specific adjustable KYB suspension 
• Smooth shifting, 6-speed, close ratio transmission
• YZ125 two-stroke engine with Yamaha Power Valve System (YPVS)
• Model-specific CDI unit
• Racing intake system
• Ultra-lightweight YZ125-spec frame
• Industry-leading, XC-specific adjustable KYB suspension
• Smooth shifting, 6-speed, close ratio transmission
• "Gripper" type seat and narrow fuel tank
• Adjustable, tapered aluminum handlebar
• 18-inch rear wheel and large rear sprocket

Engine

• Liquid-cooled, 125 cc, crankcase reed valve-inducted 2-stroke engine provides class leading power and acceleration.
  • super crisp, instant "right now" engine power (when in the powerband)
  • easy and economical to maintain, service and rebuild
• 7.5-degree cylinder angle and straight shot intake path through the combustion chamber.
  • maximum power output
• Ceramic composite cylinder bore is a linerless design with the ceramic coating sprayed directly on the aluminum block.
  • reduced weight (no heavy iron liner)
  • reduced friction
  • extended cylinder life
  • excellent heat dissipation for consistent power delivery
• Specially designed combustion chamber achieves a more complete burn at higher rpm.
  • class-leading power
• Lightweight, flat-top forged aluminum piston.
  • excellent durability
  • light weight means fast engine response
  • matches combustion chamber design for maximum power delivery
• Lightweight, ball-bearing-style crank.
  • lightweight design for fast throttle response
  • friction-reducing crank seals
• Compact crankcases.
  • lightweight design
  • helps centralize mass
• Quick-access, magnesium outer (sub) clutch cover.
  • lightweight design
  • speeds clutch access
• Close-ratio, 6-speed transmission uses optimized gear ratios.
  • ratios are matched to engine output for maximum performance
  • optimal hook-up for outstanding acceleration and corner-exiting power
  • transmission features "involute splines" for smooth, positive shifting even under power
• Yamaha's patented YPVS system.
  • features a slide (guillotine) type power valve that provides the benefits of both solid, low-rpm power delivery combined with a strong top-end punch. This system varies the exhaust port height and timing based on engine rpm.
• Mikuni TMXx38 carburetor features a "D" slide design.
  • enhances overall power delivery
  • provides crisp throttle response at all rpm
• 6-petal, carbon fibre reed design.
  • for stronger high-rpm performance with greater over-rev capacity
• CD (capacitor discharge) ignition system.
  • delivers a precise spark for fast, sure starts
  • ensures optimal timing at all rpm for fast, strong response
• High-capacity, washable, dual-stage, foam air filter.
  • excellent filtering qualities
  • reusable filter reduces maintenance costs
• Large-capacity, dual radiators feature 10-row cores.
  • maximum cooling efficiency
• Lightweight exhaust system features a re-packable aluminum silencer which allows the rider/tuner to maintain the correct amount of back pressure for maximum engine performance while reducing noise.
• Works-style clutch lever and race-spec barrel adjuster.
  • easy lever pull
  • for on-the-fly clutch adjustments

Chassis/Suspension

Details