Kawasaki Ninja 250R

2011 Kawasaki Ninja 250R - Lime greenThe 2008 Kawasaki Ninja 250R was an instant hit. Here in Thailand and all around the world, the smallest motorcycle to wear the Kawasaki Ninja badge is a top seller in Thailand

For 2011 the Kawasaki Ninja 250R (model code: EX250KBF) gets more power and produces lower exhaust emission.

No other 250cc Sport motorcycle comes close. The Kawasaki Ninja 250R is so good it has been chosen as the motorcycle for the new European Junior Cup to be held at European rounds of the 2011 WSBK championship. The Kawasaki Ninja 250R is also raced on local competition level in India and Thailand.

In the city or on twisty rural roads, the lightweight, rider-friendly Kawasaki Ninja 250R is a blast to ride! With an engine character that can be fully exploited, a compact, easy to operate chassis and full-fairing supersport styling worthy of its moniker, the Kawasaki Ninja 250R was developed to offer street sport performance to riders of all skill levels.

Powered by a gutsy 249cc parallel twin, this lightweight Kawasaki Ninja is loaded with rider friendly features such as a low seat height, low-effort controls and a comfortable riding position.

Best of all, like the Kawasaki ZX-10R and the ZX-6R supersport motorcycle models, the Kawasaki Ninja 250R places control firmly in the hands of the rider, making it one of the most exciting motorcycle in its category.

Kawasaki Ninja 250R Specifications

Kawasaki Ninja 250R Engine

The 249cc, parallel-twin cylinder, DOHC engine is designed for rider-friendly response, the Kawasaki Ninja 250R's engine was tuned to deliver smooth, step-free power. Rider who use the full range of the engine will be pleasantly surprised by the ample high-rpm performance. To enable riders to enjoy the Kawasaki Ninja 250R for a number of years, many of the engine features contribute to durability and reliability.

Fuel injection / Dual Throttle Bodies

  • Fine-atomizing (8-hole) injectors with a droplet size of 60 micron contribute to mid and high rpm throttle response.
  • Like the Kawasaki ZX-6R, the Ninja 250R features dual throttle valves for responsive power across the rev range, smooth, linear throttle response and good fuel consumption. Throttle body size is 28mm.
  • Ignition system based on that of the Kawasaki ER-6N/Ninja 650R offers high durability and reliability. Plug mounted coils deliver a hot spark while saving space.

Cylinder Head

  • Intake and exhaust ports are tuned to deliver good off-idle response and smooth power.
  • Direct valve actuation ensures reliable high-rpm operability.
  • Valves with thin heads and stems reciprocating weight.
  • Combustion chamber design optimized the squish area, maximizing combustion efficiency and thereby reducing exhaust emissions.

Transmission / Clutch

  • Involute splines on the transmission shaft reduce friction and backlash between gears and ensure smooth shifting under power.
  • Spring type clutch damper contributes to a smooth clutch feel, reducing jerkiness at very low speeds and minimizing driveline shock when rolling on and off the throttle.


  • The latest generation Denso radiator offers superior cooling performance while reducing size and weight.
  • A noise reducing ring fan is operated by a quiet running print motor that also saves space.
  • Fins on the lower side of the crankcase further aid engine cooling.

Mechanical Noise Reduction

  • Cam chain tensioner like that used on the Kawasaki KX450F motocross motorcycle features an automatic adjuster with threads and springs. The system automatically eliminates mechanical noise caused by a loose cam chain, reducing power-robbing friction loss.
  • The air cleaner features a complex construction with reinforcing ribs that help eliminate reverberation, for reduced intake noise.

Exhaust System

  • The 2-into-1 exhaust system contributes to low- and mid-range torque and helps achieve the Kawasaki Ninja 250R's smooth, step-free power curve.
  • Slightly upswept silencer underwent extensive testing to determine chamber division ratios and connecting pipe length and diameter. The result is reduced noise with minimum power loss.
  • Dual catalysers, one in the collector pipe, one in the silencer, ensure strict emissions are met. Locating the first catalyser as close to the exhaust ports as possible maximizes its efficiency. Using two catalysers enables power loss to be minimized. The Thai fuel injected model uses a honeycomb catalysers.

Rider Friendly Chassis

Sturdy frame and swingarm provide a strong, rigid base for the Kawasaki Ninja 250R. Front and rear suspension with firm settings and 17” wheels complete a smooth, rider-friendly package that offers confidence-inspiring stability at both high and low speeds.

kawasaki_ninja_250r.txt · Last modified: 2014/04/15 17:50 (external edit)
Except where otherwise noted, content on this wiki is licensed under the following license: GNU Free Documentation License 1.3


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