RACING / MACHINES / EX250 / Specifications
Kawasaki Ninja 250R (EX250) Specifications

The smallest of Kawasaki's sportbikes is the Ninja 250R. It delivers big performance and loads of styling all wrapped up in an attractively priced package.

The 250R is powered by a liquid-cooled, in-line twin-cylinder four-stroke engine with dual overhead cams and four valves per cylinder. This unintimidating yet high-output engine delivers smooth, predictable power that's perfect for the sport's new initiates. And at this time, more seasoned riders will still find the Ninja 250R an exciting experience, thanks to its 14,000-rpm redline and six-speed transmission.

What makes this Ninja motorcycle a real joy for riders of all skill levels, however, is its lightweight and compact design. It has a low seat height for confidence at stops, as well as conveniences such as electric starting and a Kawasaki Uni_Trak progressive rear suspension system. The latter is similar to that found on the larger-displacement Ninja models.

Fit and finish are up to classic Ninja motorcycle snuff, complete with an aerodynamic fairing, easy-to-read instrumentation, pop-up bungee hooks and a coolant temperature gauge. The Ninja 250R is Kawasaki Ninja performance in a compact package and at a great price.


Engine Type Liquid-cooled, 4-stroke, parallel twin, 8 valve, DOHC
Displacement 248cc
Compression Ratio 12.4:1
Bore and Stroke 62.0mm x 41.2mm (2.44 x 1.62 inches)
Redline 14,000 RPM
Valve Train DOHC; four-valve
Ignition System CDI (electronic advance)
Lubrication System Forced lubrication wet sump
Starting System Electric
Carburetion Keihin CVK30 (2), Constant velocity, Diaphragm-type
Transmission Type 6-speed, constant mesh, return shift
Clutch Type Wet, Multi-disc, Manual, Cable-actuated
Final Drive System Chain, 520x106
Front / Rear Sprocket 14T / 45T
Final Reduction Ratio 3.214 (45/14)
Primary Reduction Ratio 3.086 71/23
Gear Ratio 1st 39/15, 2nd 34/19, 3rd 31/22, 4th 29/25, 5th 27/27, 6th 25/28
Battery YB9L-A2 (12 V, 6 Ah)
Spark Plug NGK C8HSA or ND U24FS-U


Frame Type Semi-double cradle, high-tensile steel
Rake/Trail 27 deg/3.3 inches


Front Tire Tubeless; 100/80x16
Rear Tire Tubeless; 130/80x16
Brakes Single Disc front and rear with balanced action caliper
Forks Hydraulic telescopic 36mm forks w/ 125mm (5.5") of travel
Shock Bottom-Link UNI-TRAK w/ 110mm (5.1") of travel


Overall Length80.1 in (2035 mm)
Overall Width28.0 in (710 mm)
Overall Height43.1 in (1095 mm)
Seat Height29.3 in (745 mm)
Wheelbase55.1 in (1400 mm)
Ground Clearance6.1 in (155 mm)
Dry/Wet Weight304/355 pounds
Curb Weight Front167.55 lb (76 kg)
Curb Weight Front187.39 lb (85 kg)
Max Load340 pounds


Fuel Tank4.8 Gallons (Min 91 Research / 87 Avg. Octane Unleaded)
Engine Oil1.9 Liters (SE-SG Class SAE 10W40-20W50)
Coolant1 Liter or 1.1 Quarts (%50 Distilled Water/50% Ethylene Glycol Antifreeze)


0-60 mph (0-100km/h)5.5 seconds
1/4 Mile15 seconds
Maximum Speed112 mph claimed, 105 mph tested
Horsepower36 @ 12,500rpm (26 @ rear wheel) Stock Dyno Chart
Torque18.1 Ft/Lbs @10,000 RPM (14 @ rear wheel) Stock Dyno Chart
Braking Distance41 ft from 31.07 mph
(12.5 m from 50 km/h)
Minimum Turning Radius9.19 ft (2.3 m)
Fuel Efficency55-75 MPG

Parts Catalog (local mirror)
I also include aftermarket alternatives as I discover / need them.

Coverting your Ninja into a competitive race bike.

In memory of Speedshop  LP Privateer  LP Racing  Aftershocks  Pirelli

December 22, 2014