| | | | Detailed first look : 2008 Kawasaki Ninja 250R |  Written: 28/09/2007 : 11:31. Read 10482 times (47/day). | | The integrality of this filed article is for Premium Members. | In the city or on twisty country roads, the lightweight, rider-friendly 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, this model was developed to offer street sport performance to riders of all skill levels.
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Powered by a 249 cm³ parallel twin, this lightweight Ninja is loaded with features such as a low seat height, low-effort controls and a comfortable riding position.
Lightweight handling, easy controllability and gutsy throttle response make the 250R fun to ride on city streets. For great handling and high stability it runs 17-inch wheels. 2-piston disc brake delivers plenty of stopping power. Like Kawasaki’s other sport models, the Ninja 250R is fitted with petal discs for efficient heat dissipation.
Engine
Carburettor (EX250J: USA/CAN/AUS)
Settings for the twin Keihin CVK30 carburettors were idealised for good power feel with low fuel consumption.
Fuel injection / Dual throttles (EX250K: EUR/JAP)
* Fine-atomising (8-hole) injectors with a droplet size of 60 µ contribute to mid- and high-rpm throttle response.
* Like the Ninja 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 28 mm.
* Ignition system based on that of the ER-6n/6f offers high durability and reliability. Plugmounted coils deliver a hot spark while saving space.
Cylinder head
* Idealised intake and exhaust ports contribute to good off-idle response and smooth power delivery.
* Direct valve actuation ensures reliable high-rpm operability.
* Valves with thin heads and stems reduce reciprocating weight.
* Valve timing and lift were designed for low- and mid-range torque.
Piston / Cylinder
* Pistons feature reinforced heads and strengthening in the pin boss area for increased durability. (Longitudinally) thick piston rings help minimise oil consumption.
* Combustion chamber design optimises the squish area, maximising combustion efficiency and thereby reducing emissions.
Exhaust system
* The 2-into-1 exhaust system contributes to low- and mid-range torque and helps ach ...
The integrality of this filed article is for Premium Members.
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