2011 Kawasaki Ninja 250R
Engine Configuration Parallel Twin, 4-stroke
Engine Displacement 249 cc
Engine Cooling Liquid
Compression Ratio 11.6:1
Combustion Chamber Design Pentroof
Valves Per Cylinder 4
Intake Valves Per Cylinder 2 (Steel)
Exhaust Valves Per Cylinder 2 (Steel)
Bore x Stroke 62.0mm x 41.2mm
Connecting Rod Length
          (center-to-center)
98.9mm 
Connecting Rod Material Steel
Claimed Peak Horsepower 25.37bhp @ 11,300rpm
Claimed Peak Torque 12.96lbs.-ft. @ 9,750
Engine Redline 13,280 rpm
Valve Angle (Included) 16.2mm Intake/ 19.3 degrees Exhaust (35.5 degrees)
Combustion Chamber Volume 11.7cc
Valve Train Type DOHC, Link-plate Chain Drive, Bucket Followers, Shim-under-bucket Lash Adjustment
Valve Adjustment Interval 12,000 miles
Intake Valve Diameter 22.5 mm
Exhaust Valve Diameter 20.0 mm
Intake Valve Stem Diameter 4.5 mm
Exhaust Valve Stem Diameter 4.5 mm
Intake Valve Maximum Lift 7.9 mm
Exhaust Valve Maximum Lift 6.9 mm
Intake Valve Timing  
          Open BTDC 36 degrees
          Close ABDC 31 degrees
          Duration 272 degrees
Exhaust Valve Timing  
          Open BTDC 61 degrees
          Close ABDC 31 degrees
          Duration 272 degrees
Valve Timing Measuring Point 0.3mm (lift)
Fuel Delivery System (2) Keihin CVK30 Carburetors
Throttle Body Venturi Size 30mm
Air Filter Type Foam Element
Exhaust System Type 2-1 (Steel)
Ignition System Digital
Lubrication System Wet Sump
Oil Capacity 1.8 quarts (1.7 liters)
Fuel Capacity 4.8 gallons (18.2 Liters)
Transmission Type 6-speed Constant Mesh
Clutch Type Multi-plate, Wet
Clutch Actuation System Cable
Clutch Spring Type Coil
Number Of Clutch Springs 4
Number of Clutch Plates 9
          Drive Plates 5
          Driven Plates 4
Primary Drive Gear (straight-cut)
Primary Drive Gear Teeth (Ratio) 71/23 (3.087:1)
Final Drive Sprocket Teeth (Ratio) 45/14 (3.214:1)
Transmission Gear Teeth (Ratios)  
          6th 25/28 (0.892:1)
          5th 27/27 (1.000:1)
          4th 29/25 (1.160:1)
          3rd 32/22 (1.454:1)
          2nd 34/19 (1.789:1)
          1st 39/15 (2.600:1)
 Transmission Overall Ratios  
          6th 8.849:1
          5th 9.921:1
          4th 11.508:1
          3rd 14.4252:1
          2nd 17.749:1
          1st 25.795:1