Engine:

Engine Type : MC16E 90º V-Twin Liquid Cooled 2-Stroke
: Crankcase Reed Valve Induction
Bore and Stroke : 54mm x 54.5mm 
Capacity : 249cc
Compression Ratio : 7.4:1
Clutch : R models - Wet Multi Plate with Coil Springs
    SP models - Dry Multi Plate with Coil Springs
Maximum Power : 40PS @ 9000 rpm
Maximum Torque : 3.3Kg-m @ 8500 rpm
Ignition : CDI PGM-IV
Spark Plug Type : NKG BR9ECM (BR10ECM)
: Denso W27EMR-C (W31EMR-C)
Spark Plug Gap : 0.7mm - 0.8mm (0.028" - 0.031")
Idle Speed : 1200rpm  100rpm

Dimensions:

Length : 1970mm 
Width : 650mm 
Height : 1045mm 
Wheelbase : 1340mm
Ground Clearance : 135mm
Seat Height : 770mm
Dry Weight R model : 138Kg 
SE model : 138Kg
SP model : 137Kg

Capacities:

2-Stroke Oil : 2.1 litre
Transmission Oil : 0.8 litre (rebuild)
: 0.7 litre (drain/change)
Fuel Tank : 16 litre (primary)
: 1.2 litre (reserve)

Suspension:

Castor : 23°
Trail : 85mm
Front (R models) : Telescopic oil filled damper

  with spring preload adjustment only.
(SE) : Telescopic oil filled damper with spring preload
    & rebound adjustment.
(SP) : Telescopic oil filled cartridge-type damper with
    spring preload & rebound adjustment.
Rear (R models) : Pro-Arm® with external coil and damper unit
  with variable spring preload adjustment only.
(SE/SP) : Pro-Arm® with external coil and damper unit
    with variable spring preload, and remote rebound/compression adjustment.
Front Tyre & Wheel (R/SE models) : 110/70 x 17" Aluminium Enkei
Rear Tyre & Wheel (R/SE models) : 150/60 x 17" Aluminium Enkei
Front Tyre & Wheel (SP models) : 110/70 x 17" Magnesium Magtek
Rear Tyre & Wheel (SP models) : 150/60 x 17" Magnesium Magtek
Tyre Pressure (Front - all models) : 2.25kg/cm
Tyre Pressure (Rear - all models) : 2.25kg/cm (rider only)
  2.50kg/cm (rider & passenger)

Brakes:

Front : Twin 276mm floating disk
    with cast aluminium 4 piston calipers.
Rear : Single 220mm disk with cast aluminium
    single piston sliding caliper.

Gearbox:

1st : 2.846
2nd : 2.000
3rd : 1.578
4th : 1.300
5th : 1.130
6th : 1.000
Drive Sprocket (front) : 15T
Driven Sprocket (rear) : 44T

Electrical System:

Battery Type : 12V 4AH Yuasa YT4L-BS
Charging System Output : Not Available

Lighting:

Front : 60/35W Halogen
Rear : 5/18W (Tail/Brake)
Park : 17W
Turn Indicator : 15W x4
Instrument Backlight : 1.7W
Neutral Warning : 1.7W
Indicator Warning : 1.7W
Main Beam Warning : 1.7W

Fuses:

Main : 20A
Accessory : 15A
 

NSR250 MC21 specificationsNSR250 Specifications