- Liquid-cooled, 124cc, crankcase reed valve-inducted 2-stroke engine provides class leading power and acceleration and it's easy to service too.
- 7.5-degree cylinder angle and specially designed straight shot intake path through the combustion chamber provides maximum power output.
- Ceramic composite cylinder bore is a "liner less" design with the ceramic coating sprayed directly on the aluminum block. The benefits include reduced weight (no heavy iron liner), reduced friction, extended cylinder life and excellent heat dissipation for consistent power delivery.
- Specially designed combustion chamber achieves a more complete burn at higher rpms for exceptional power output.
- The flat top piston matches the combustion chamber design for maximum power delivery.
- In order to reduce frictional losses, the lightweight crank uses special friction reducing crankshaft seals that reduce reciprocating losses for improved power.
- Compact, lightweight crankcases.
- Quick-access, magnesium outer clutch cover is light weight and speeds clutch access.
- Close-ratio, 6-speed transmission uses optimized gear ratios to maximize power for outstanding acceleration and corner-exiting 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. The TMXx carb uses a "D" shaped slide design to enhance overall power, while providing crisp throttle response at all rpms.
- 6-petal, carbon fiber reed design means stronger high-rpm performance with greater over-rev capacity.
- CD (capacitor discharge) ignition system delivers a precise spark and monitors engine speed to ensure optimal timing at all rpms for fast, strong response.
- Washable, dual-stage, foam air filter reduces maintenance costs.
- Large-capacity, dual radiators feature 10-row cores to deliver 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 features a race-spec "barrel adjuster" for on-the-fly clutch adjustments.
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- Lightweight, aluminum, semi-double-cradle frame combined with the compact engine design, offers an awesome power to weight ratio. The obvious benefit of an aluminum frame is a significant reduction in overall machine weight. Yamaha has maintained the semi-double cradle design because it offers an excellent balance between stiff lateral and torsional rigidity while offering more controlled flex in the longitudinal plane. This frame design offers the ideal "rigidity balance" which means it offers the flexibility of a steel frame with the lighter weight of an aluminum frame. This frame is made from a unique mix of castings, forgings and extrusions that provide stiffness where it is required and controlled flexibility in other areas. The result is a super light aluminum frame, which provides excellent handling, good ride quality, excellent stability and responsive cornering performance.
- Removable rear subframe is constructed of square-section, lightweight aluminum. Detachable design allows easy access when servicing rear suspension components.
- Lightweight, tapered design aluminum swingarm is produced using "hydro forming", a special forming method that uses high pressure water to form shapes.
- Cast aluminum upper and forged lower triple clamps provide both lightweight and strength for fast, agile handling.
- Adjustable handlebar mounts allow the handlebars to be moved 10mm rearward if desired.
- "Speed Sensitive System" 48mm, adjustable, inverted, Kayaba cartridge fork features a twin-chamber design. The twin chamber design means the damper unit is in a separate structure which prevents aerated fork oil from entering the inner damper assembly and degrading its damping abilities. Since the inner damper is pressurized, it also eliminates bubbles forming in the oil. The Speed Sensitive design means the damping force is controlled by the piston speed in the fork.
- Kashima coating on the pressure tank and the piston rod reduce friction for smoother suspension performance. Low friction oil seals provide reduced stiction for a smoother stroke.
- This fork also features a Transfer Control Valve (TCV). The TCV enhances the damping force of the inner damper from mid stroke to full stroke and improves bottoming characteristics. The benefit of TCV is more precise control throughout the full stroke range.
- "Kashima coating" is applied to the fork tubes to reduce friction for smoother suspension performance. Front wheel travel is 300mm (11.8").
- Front fork adjustments include: 20-way compression damping and 20-way rebound damping. Optional fork springs are available through Genuine Yamaha parts.
- Large "wrap-around" plastic fork protectors provide excellent protection from dirt, mud and stone chips. The "self-supporting" design reduces friction for smoother fork operation.
- Monocross link rear suspension features a fully adjustable, Kayaba, piggyback shock which provides 315mm (12.4") of wheel travel and features separate adjusters for high- and low-speed compression damping. Adjustments include: spring preload, 20-way rebound damping, 20-way low-speed compression damping and 2 turns of high speed compression damping. The damper rod is 18mm in diameter, while Kashima coating is used in the shock body and sub tank to reduce friction and improve suspension performance during a long moto. The Kayaba shock utilizes a full rebound oil lock system for excellent suspension function and great ride quality.
- 250mm floating front disc brake with Nissin twin piston caliper features a "wave" style rotor (disc) which reduces weight, improves cooling and improves styling. The braking performance is excellent with great feel and control.
- "Shorty" front brake lever is adjustable for various hand sizes.
- 245mm rear disc brake with single piston caliper uses an integrated master cylinder (fluid reservoir is integrated into the top of the master cylinder) for strong stopping power with excellent feel and control.
- "Wave" style rear rotor (disc) reduces weight, improves cooling and also adds a special styling highlight too.
- The rear single piston brake caliper features a new rugged plastic caliper protector, while the lower edge of the disc is protected by a new lower disc guard.
- "Sun Star" rear sprocket increases the contact area between the sprocket and chain rollers, thereby reducing the load on the chain and increasing the service life of both chain and sprocket.
- Lightweight, D.I.D. 21" front and 19" rear rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance and handling.
- Dunlop MX52 series tires.
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