2017 YZ250X (2-stroke)

$7,999

Cross country and enduro racing are currently experiencing increased popularity and growth. Based on the legendary YZ250 2-stroke, the “X” version has been developed using all of Yamaha’s extensive 2-stroke knowledge to produce a model that offers a high level of performance for cross country racing. The YZ250X is a lightweight, compact machine that is both exciting to ride and affordable to own and maintain.

Dealer #: 6249


INQUIRY ABOUT PRODUCT

Key Improvements for 2017

  • Larger 270 mm front disc brake with wave-style rotor & twin piston caliper
  • The 2017 YZ250X is based on the current YZ250 2-stroke with the following additional features that enhance its competitiveness for cross country racing / riding.

  • “Re-tuned” engine Vs. YZ250 (head, ignition, porting & YPVS)
  • Wider ratio transmission gears Vs. YZ250 (3rd gear & higher)
  • Heavy duty clutch
  • New expansion chamber shape
  • Revised front & rear suspension settings
  • 18″ rear wheel
  • Aluminum side stand
  • On-off-reserve fuel petcock

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
  • Key engine differences Vs YZ250.
    • revised cylinder head volume Vs. YZ250 (slight increase in volume Vs. YZ250)
    • 7.9:1 compression ratio (slightly less than YZ250)
    • revised YPVS power valve (actuation rpm & shape)
    • revised exhaust port (main) size & timing
    • wider 3rd, 4th & 5th gears ratios
    • expansion chamber front diameter (reduced)
  • Lightweight, flat top forged aluminum piston.
    • excellent durability
    • light weight means fast engine response
  • “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
  • Lightweight, ball bearing style crank.
    • lightweight design for fast throttle response
    • friction reducing crank seals
  • 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
  • Keihin PWK38S carburetor with power jet & throttle position sensor (TPS).
    • precise fuel – air mixing
    • extra-crisp throttle response throughout the powerband
  • Special-design, 4-petal, carbon fiber reeds.
    • excellent throttle response & engine performance across the entire RPM range
  • Smooth-shifting, wide ratio 5-speed 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
    • wider 3rd, 4th & 5th gears ratios (Vs. YZ250) … see spec sheet
  • Heavy-duty, multi-plate clutch.
    • Clutch spring load is reduced for easier clutch lever pull Vs. YZ250 (less fatigue)
    • quick-access, outer clutch cover allows for fast, easy clutch maintenance
  • CD (capacitor discharge) ignition system.
    • delivers a precise spark for fast, sure starts
    • ensures optimal timing at all rpms for fast, strong response
  • High capacity, washable, dual-stage, foam air filter.
    • excellent filtering qualities
    • reduces maintenance costs … foam filter is re-useable
  • Large-capacity, dual radiators feature 10-row cores.
    • maximum cooling efficiency
  • Lightweight exhaust system.
    • computer designed expansion chamber provides maximum engine performance
    • lightweight, aluminum silencer is re-buildable for optimum performance & reduced noise levels
    • sound output is 94 dB
  • Works-style clutch lever & race-spec “barrel adjuster.”
    • light, easy lever pull
    • lever position (reach) can be set to rider’s preference
    • for on-the-fly clutch adjustments

CHASSIS/SUSPENSION

  • Lightweight, aluminum, semi-double-cradle frame.
    • combines with compact engine to provide an awesome power to weight ratio
    • obvious benefit of an aluminum frame is a significant weight reduction
    • Yamaha maintains the semi-double cradle design because it offers an excellent “rigidity balance” between lateral & torsional rigidity while offering controlled flex in the longitudinal plane
    • result is a light aluminum frame, which provides excellent handling, good ride quality, excellent stability & responsive cornering performance
  • Removable rear subframe.
    • constructed of square-section, lightweight aluminum
    • detachable design allows easy access when servicing rear suspension components
    • reduces costs in the event of a loop out
  • Lightweight, tapered design aluminum swingarm.
    • produced by “hydro forming”, a forming method that uses high pressure water to form shapes
    • excellent rear wheel traction & control
    • lightweight design
  • Cast aluminum upper and forged lower triple clamps.
    • strong yet lightweight
    • fast, agile handling
  • Adjustable handlebar mounts.
    • allow handlebar to be moved 10mm rearward if desired
  • “Speed Sensitive System” 48mm, adjustable, inverted, “twin chamber” KYB fork. Front wheel travel is 300 mm (11.8″).
    • twin chamber design means the damper unit is in a separate structure which prevents aerated fork oil from entering the inner damper assembly & degrading its damping abilities
    • the inner damper is pressurized, it also eliminates bubbles forming in the oil
    • “Speed Sensitive” design means the damping force is controlled by piston speed, not position in the fork
    • low friction fork seals provide reduced stiction for a smoother stroke
    • spring & damping settings are optimized for cross country use
    • fork adjustments include: 20-way compression damping & 20-way rebound damping
    • optional fork springs are available through Genuine Yamaha parts
  • Fork also features a Transfer Control Valve (TCV).
    • TCV enhances damping from mid to full stroke & improves bottoming characteristics
    • TCV offers more precise control throughout the full suspension stroke
    • TCV is located on the upside of the spring & its function is controlled by piston speed, not piston position, hence the term “Speed Sensitive System fork”.
  • Large “wrap-around” plastic fork protectors.
    • provide excellent protection from dirt, mud & stone chips
    • “self-supporting” design reduces friction for smoother stroke
  • Monocross link rear suspension features a fully adjustable, Kayaba, piggyback shock which provides 315 mm (12.4″) of wheel travel.
    • features separate adjusters for high- and low-speed compression damping
    • adjustments include: spring preload, 20-way rebound damping, 20-way low-speed compression damping & 2 turns of high speed compression damping
    • spring & damping settings are optimized for cross country use
    • 18 mm damper rod
    • Kashima coating (friction reducer) is used in the shock body & sub tank to reduce friction & improve suspension performance
    • piggyback shock utilizes a full rebound oil lock system for excellent suspension function & great ride quality
    • spring & damping settings are optimized for cross country use
  • New, larger, 270 mm floating front “wave-style” disc brake with Nissin twin piston caliper.
    • “wave” style rotor (disc) reduces weight, improves cooling (more surface area) & improves styling
    • braking performance is excellent with great feel & control
  • “Shorty” front brake lever is adjustable for various hand sizes.
  • 245 mm rear “wave-style” disc brake with single piston caliper.
    • integrated master cylinder (fluid reservoir is integrated into the top of the master cylinder)
    • “wave” style rotor (disc) reduces weight, improves cooling (more surface area) & improves styling
    • strong stopping power with excellent feel & control
  • Rugged, plastic rear caliper & lower rear disc protectors / guards.
  • Lightweight, Sun Star rear sprocket.
    • increases the contact area between the sprocket & chain rollers
    • reduces the load on the chain & increases service life of chain & sprocket
  • Heavy duty “O”- ring chain for excellent durability.
  • Lightweight, D.I.D. 21″ front and 18″ rear rims & premium Dunlop tires.
    • provide excellent durability
    • reduces unsprung weight for optimal suspension performance & handling
  • “Flat-design” seat features multi density foam.
    • provides good initial softness / comfort and then increases the firmness as more pressure is applied
    • “pebble” finish on the top and side surfaces provides excellent rider grip & durability
  • Seat, handlebar & fuel tank ergonomics provide excellent freedom of movement for the rider.
  • Large, 8 litre plastic resin fuel tank.
    • on – off – reserve fuel petcock
    • reserve amount is approx. 2 litres
  • Lightweight aluminum side stand.

DETAILS

  • Slim design, aggressive bodywork allows easy rider movements
  • Lightweight YZ250F/450F based wide footpegs provide excellent grip & ground clearance
  • Rugged chain guide helps prevent the chain from de-railing and also helps to protect the rear sprocket.
  • Serrated rear brake lever and folding shift lever tip
  • Stainless steel, inner clutch cable provides excellent strength, smooth action and long life
  • Heavy-duty 520 “O” ring chain
  • E10 friendly fuel system components

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