Displacing 249 cm³, the new engine delivers significantly increased performance compared to its predecessor: 28.5 kW for the new Ninja 250 (+5 kW vs the 2017 Ninja 250). The higher performance can largely be credited to the new downdraft intake, which is accompanied by a larger airbox offering increased intake efficiency. The increased performance is complemented by a rider-friendly character; the smooth response and abundant low-end torque facilitate throttle control for new and experienced riders alike.
Large 5.8 L airbox (previously 4.7 L) was made as tall as possible to ensure sufficient clearance for the intake funnels. The new design contributes to increased intake efficiency. Revised rigidity for the top of the airbox eliminates unwanted noise, enabling riders to more clearly hear the engine’s intake note when accelerating.
Downdraft intake provides a shorter, more direct path for intake air to enter the cylinder, improving cylinder-filling efficiency and contributing to increased engine power, especially at high rpm. (The downdraft intake also contributes to chassis layout by freeing up space under the seat, facilitating a design that offers an easy reach to the ground.)
Innovative Kawasaki technology like the new radiator fan cover (patent pending) located behind the radiator directs hot air out to the sides away from the rider, reducing rider discomfort when stuck in heavy traffic. Redirecting the air also helps keep the tank, frame and other parts that contact the rider cooler, further increasing rider comfort. The new heat management system was design using CFD analysis, and, unlike the previous version, requires no parts (covers, rubber sheets, etc) directing airflow inside the engine compartment.
When excessive engine braking occurs – as a result of quick downshifts (or an accidental downshift) – the slipper cam comes into play, forcing the clutch hub and operating plate apart. This relieves pressure on the clutch plates to reduce back-torque and help prevent the rear tyre from hopping and skidding.
Specifications |
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ENGINE | |||
Type | Liquid-cooled, 4-stroke Parallel
Twin |
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Displacement | 249cm³ | ||
Bore and Stroke | 62.0 x 41.2 mm | ||
Compression Ratio | 11.6:1 | ||
Valve System | DOHC, 8 Valves | ||
Performance: |
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a) Maximum power | 28.5 kW {39 PS} / 12,500minˉ¹ | ||
b) Maximum torque | 23.5 N.m {2.4 kgf.m} / 10,000
minˉ¹ |
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Fuel System | Fuel injection: ø32 mm x 2 | ||
Ignition | Digital | ||
Starting | Electric | ||
Lubrication | Forced lubrication, wet sump |
FRAME | |
Type | Trellis, high-tensile steel |
Caster (rake) | 24.3° |
Tyre: | |
a) Front | 110/70-17 M/C 54H |
b) Rear | 140/70-17 M/C 66H |
Steering Angle (Left/Right) |
35° / 35° |
SUSPENSION | |
Front: Type | ø41 mm telescopic fork |
Rear: Type | Bottom-Link Uni-Trak, gas-charged shock with adjustable preload |
BRAKES | ||
Front: Type
Caliper: |
Single semi-floating ø310 mm petal disc Single balanced actuation dual-piston | |
Rear: Type
Caliper: |
Single ø220 mm petal disc Dual-piston | |
DRIVE TRAIN | ||
Transmission | 6-speed, Return | |
Final Drive | Chain | |
Primary Reduction Ratio | 3.069(89/29) | |
Gear ratios: | ||
1st | 2.769(36/13) | |
2nd | 1.895 (36/19) | |
3rd | 1.500(33/22) | |
4th | 1.240 (31/25) | |
5th | 1.074(29/27) | |
6th | 0.960 (24/25) | |
Final reduction ratio | 2.857(40/14) | |
Clutch | Wet multi-disc, Manual |
DIMENSIONS | |
Overall length | 1,990 mm |
Overall width | 710 mm |
Overall height | 1,125 mm |
Wheelbase | 1,370 mm |
Ground clearance | 145 mm |
Seat height | 795 mm |
Curb mass | 164 kg (STD) |
Fuel capacity | 14 litres |
Type | Sport Bike |
Brand | Kawasaki |
Model | Ninja 250 model 2018 |
Mileage | 0ml |
Engine | 249cc |
Year | 2018 |
Color | Red |