KEY FEATURES - Bold Monster Energy® YZ Styling
- Aggressive, race-inspired styling—from the sharp bodywork including front and rear fenders, radiator shrouds and number plates, to the smaller details like fork guards, rear brake disc and caliper protectors, and wide foot pegs—spotlights the YZ250's extensive two-stroke racing pedigree from every angle. A Monster Energy®-inspired graphics package completes the factory-ride look and feel.
- Compact, liquid-cooled, 249 cc, piston-reed-valve-inducted, 2-stroke engine
- Smooth shifting, 6-speed, close ratio transmission
- Keihin PWK38S carb with 4-petal carbon fiber reeds
- Yamaha's patented YPVS exhaust power valve system
- Lightweight, aluminum, semi-double-cradle frame with detachable rear subframe
- Fully adjustable KYB suspension
- 270 mm front & 245 mm rear disc brakes
- Adjustable aluminum handlebar & titanium foot pegs
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ENGINE -
Lightweight, compact, liquid-cooled, 249cc, piston-reed-valve-inducted, 2-stroke.
- super crisp, instant 'right now' engine power (when in the 'power band')
- easy & economical to maintain, service & rebuild
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Lightweight, flat top forged aluminum piston.
- excellent durability
- light weight means fast engine response
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Liner-less, ceramic composite cylinder bore with ceramic coating sprayed directly on the aluminum block.
- excellent heat dissipation
- reduced weight (no heavy iron liner)
- reduced friction
- extended cylinder life
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Lightweight, ball bearing style crank.
- lightweight design for fast throttle response
- friction reducing crank seals
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YPVS power valve system features a total of three slides (one main and two auxiliary slides).
- YPVS system varies the exhaust port height & timing based on engine rpm
- provides the benefits of both solid, low rpm power delivery & strong top-end punch
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Keihin PWK38S carburetor with power jet and throttle position sensor (TPS).
- precise fuel - air mixing
- extra-crisp throttle response throughout the powerband
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Special-design, 4-petal, carbon fiber reeds.
- excellent throttle response & engine performance across the entire RPM range
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Smooth-shifting, 5-speed, close-ratio transmission.
- ratios are matched to engine output for maximum performance
- optimal hook-up for outstanding acceleration & corner-exiting power
- transmission features 'involute splines' for smooth, positive shifting even under power
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Heavy-duty, multi-plate clutch.
- quick-access, outer clutch cover allows for fast, easy clutch maintenance
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CD (capacitor discharge) ignition system.
- delivers a precise spark for fast, sure starts
- ensures optimal timing at all rpms for fast, strong response.
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High capacity, washable, dual-stage, foam air filter.
- excellent filtering qualities
- reduces maintenance costs... foam filter is re-useable
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Large-capacity, dual radiators feature 10-row cores.
- maximum cooling efficiency
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Lightweight exhaust system.
- computer designed expansion chamber provides maximum engine performance
- lightweight, aluminum silencer is re-buildable for optimum performance & reduced noise levels
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Works-style clutch lever & race-spec 'barrel adjuster.'
- light, easy lever pull
- for on-the-fly clutch adjustments
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CHASSIS/SUSPENSION -
Optimized Rider Ergonomics
- A flat seat and narrow fuel tank design, along with smoothly integrated body panels and slimmer shroud width, combine to enable greater freedom of movement forward and back, allowing the rider to easily shift body weight for increased control and confidence.
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Lightweight, aluminum, semi-double-cradle frame.
- combined with compact engine to provide an awesome power to weight ratio
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