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Honda NSR 250R

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Make Model

Honda NSR 250R MC21

Year

1990

Engine

Two stroke, 90°V-twin cylinder, reed valve/exhaust valve

Capacity

249 c / 15.2 cu-in
Bore x Stroke 54 x 54.5 mm
Cooling System Liquid cooled
Compression Ratio 7.3 : 1

Induction

TA20 Carburetor Type

Lubrication Seperate Pump (engine)
splash type (transmission)

Ignition 

PGM-CDI
Starting Kick

Max Power

45 hp / 32.8 kW @ 9500 rpm

Max Torque

35 Nm / 25.8 ft-lb @ 8500 rpm
Clutch Multi-plate, coil spring

Transmission

Constant Mesh 6-speed
Final Drive Chain
Gear Ratio 1st: 2.642 / 2nd: 1.800 / 3rd: 1.380 / 4th: 1.125 / 5th: 1.000 / 6th: 0.916
Frame Aluminum tube type frame

Front Suspension

41mm Telescopic air valve semi-adjustable

Rear Suspension

Rear: Pro-Link Single shock swingarm non-adjustable

Front Brakes

2x discs  2 piston calipers

Rear Brakes

Single disc 1 piston caliper

Front Tyre

110/70-17 53 H

Rear Tyre

150/60-R18 67 H

Rake 23°15’
Trail 87 mm / 3.4 in
Dimensions Length  1975 mm / 77.7 in
Width    655 mm / 25.7 in
Height   1060 mm / 41.7 in
Wheelbase 1345 mm / 52.9 in
Seat Height 770 mm / 30.3 in
Ground Clearance 135 mm / 5.3 in

Dry Weight

132 kg / 291.8 lbs
Wet Weight 151 kg / 337 lbs

Fuel Capacity

16 Litres / 4.2 US gal
Review Type I  /  Type II / Technical / nsr250.net

The 1990 NSR's that went on sale from February 13, 1990. These bikes were code named MC21 from the factory and were completely new and different in every way from the earlier NSR's. New everything, gullarm suspension, more exciting bodywork, PGM III intake system, 17 inch wheels with sportier rubber and different colors. Available colors for the 1990 models were red and white with blue accents, blue and white with yellow accents, also black and red with grey accents. These were the standard R type colors and were priced at 609,000 Yen. The option of the SP was available too with it's Cabin racing colors in red, silver, gold and black.