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Discussion Starter #1
2011 Kawasaki 250R Pictures and Information

Key Features
- 249cc parallel-twin liquid-cooled engine emphasizes low- and mid-range power
- Low 30.5-inch seat height boosts new rider confidence
- Six-speed transmission offers smooth shifting under power
- Sporty Ninja® styling matches its supersport brethren
- Petal-shaped disc brakes yield a direct feel at the lever
- 17-inch wheels suit a variety of tire fitments

DOHC 249cc Parallel-Twin cylinder Engine
- Compact parallel-twin design offers good mass centralization for superior handling
- Tuned to deliver smooth, step-free power with an emphasis on low- and mid-range power for rider-friendly response
- Pistons feature reinforced heads and strengthening in the pin boss area for increased durability
- Thick piston (longitudinally) rings help prevent oil consumption
- Combustion chamber design optimized to maximize combustion efficiency and reduce emissions
- Ample high-rpm performance will please riders using the full range of the engine

Cylinder Head
- Intake and exhaust ports contribute to good off-idle response and smooth power delivery
- Valve timing and lift designed for strong low- and mid-range torque
- Direct valve actuation helps ensure reliable high-rpm operability
- Thin heads and stems on valves for reduced reciprocating weight

- Fine-tuned twin Keihin CVK30 carburetors offer good power feel and low fuel consumption

Reduced Mechanical Noise
- Self-adjusting cam chain tensioner eliminates mechanical noise caused by a loose cam chain and reduces power-robbing friction loss
- Minimizing mechanical noise allows the use of a freer flowing exhaust for better performance
- Complex construction with reinforcing ribs helps eliminate airbox reverberation and reduces intake noise
- Air filter accessible from the side, for easy replacement

Exhaust System
- 2-into-1 system contributes to the Ninja 250R’s low- and mid-range torque and smooth, step-free power curve
- Slightly upswept silencer extensively tested to determine chamber size, connecting pipe length and diameter to achieve least noise and most power
- Meets strict emissions with dual catalyzers; one in the collector pipe and the other in the silencer
- Using two catalyzers minimizes power loss
- First catalyzer is positioned close to the exhaust ports for maximum efficiency

Liquid Cooling
- Latest-generation Denso radiator offers superior cooling with minimal space and weight
- Ring fan uses a quiet-running motor that also saves space
- Fins on the lower side of the crankcase helps further cool the engine

Six-speed Transmission/Clutch
- Involute splines reduce friction and backlash between gears and shafts for easier gear meshing and smooth shifting under power
- Spring-type clutch damper reduces hesitation at very low speeds and minimizes shocks when rolling on and off the throttle for a smoother clutch feel
- Paper-base friction plates help increase clutch durability

- Sturdy and durable diamond-style frame of thick-walled steel tubing offers confidence-inspiring stability at both high and low speeds
- Beefy swingarm bracket contributes to the frame’s rigidity and helps achieve an ideal chassis stiffness balance
- Square-tube swingarm with a 60 x 30mm cross section further adds to rigidity

- 37mm telescopic front fork with firm settings contribute to the Ninja 250R’s smooth, stable handling and enhanced ride control
- Uni-Trak® rear suspension complements the rigid frame and provides great road holding ability
- Rear shock features 5-way adjustable preload, enabling ride height to be maintained whether riding solo or with a passenger

- Features 17-inch wheels like its larger supersport siblings
- The use of proper sportbike tires contributes to its easy, neutral handling at low speeds

- Large-diameter, 290mm front petal disc and a balanced action two-piston caliper offer excellent braking performance and a natural, direct feeling at the lever
- Two-piston caliper grips the rear 220mm petal disc

- Natural riding position with slightly forward-slanting seat and wide, raised handlebars

- Styling, fit and finish of striking full-fairing bodywork match its Ninja supersport siblings
- Aggressive dual-lamp headlight design, slim tail cowl and separate seats further enhance the supersport look
- Front cowling and windscreen offer the rider a substantial amount of wind protection
- Two helmet holders conveniently located under the rear seat
- Under-seat storage can hold a U-lock or similar device
- Two hooks under the tail and the rear passenger pegs provide anchor points for securing items to the rear of the bike

- Instrument panel features an easy-to-read, large-face analog speedometer along with an analog tachometer, odometer, trip meter, fuel gauge and warning lights

Engine: Four-stroke, liquid-cooled, DOHC, parallel twin
Displacement: 249cc
Bore x stroke: 62.0 x 41.2mm
Compression ratio: 11.6:1
Cooling: Liquid
Carburetion: Keihin CVK30 x 2
Ignition: TCBI with digital advance
Transmission: Six-speed
Final drive: O-ring chain
Frame: Semi-double cradle, high-tensile steel
Wheelbase: 55.1 in.
Rake / trail: 26 degrees / 3.2 in.
Front suspension / wheel travel: 37mm hydraulic telescopic fork / 4.7 in.
Rear suspension / wheel travel: Bottom-link Uni-Trak® with 5-way adjustable preload / 5.1 in.
Front tire: 110/70-17
Rear tire: 130/70-17
Front brake: Single 290mm hydraulic petal disc with two-piston caliper
Rear brake: Single 220mm petal disc with two-piston caliper
Overall length: 82.1 in.
Overall width: 28.1 in.
Overall height: 43.7 in.
Seat height: 30.5 in.
Curb weight: 374.9 lbs.
Fuel capacity: 4.8 gal.
Color choices / special edition: Ebony, Lime Green / Ebony (SE),
Pearl White / Ebony (SE)
Warranty: 12 months

Site Admin
486 Posts
Discussion Starter #2
Affordable, Fuel-saving Fun

For those beginning their two-wheeled journey, the Ninja 250R sportbike has always been a great option to start. Its low seat height and peppy engine translate into hours of fun for both novices and veterans. Though its engine may be compact, its eight-valve cylinder head means a rider can wring every bit of enjoyment from each twist of the throttle, from idle to redline. And with sharp styling that matches its supersport siblings, the Ninja 250R looks fast even while standing still. Best of all, the 250R is a great value, with an affordable purchase price and excellent fuel economy.

The fun begins with its 249cc liquid-cooled engine that thrives on high-rpm excitement. The parallel-twin is tuned for peppy power delivery that’s both smooth and predictable, making for a beginner friendly motorcycle. A silky-smooth six-speed transmission lets riders exploit the 250R’s powerband from that low-end grunt to the crowd pleasing and lively top-end rush. Just like the supersports, it uses petal disc brakes. And the lightweight Ninja provides plenty of entertainment from the initial learning curve to beyond.

Wrapping the 250R are the fairing and windscreen that not only look great, but deliver wind protection for a wide range of riding situations. An easy-to-read instrument panel with fuel gauge and neutral indicator is another convenient feature for the new rider.

A natural riding position and comfortable ergonomics combine with lightweight handling, easy controllability and great throttle response for pure pleasure on city streets. Part of this great handling and stability comes from the 17-inch wheels. Bringing the show to a stop are the large petal-shaped 290mm front rotors and a single 220mm rear rotor gripped by powerful two-piston hydraulic calipers. Like Kawasaki’s other Ninja models, the 250R is equipped with quality components and tuned for class-leading performance.

Lightweight and agile, the Ninja 250R boasts low ownership costs and is a dominating force in the entry-level sportbike category.
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