Honda NSR 250R-SP


Make Model

Honda NSR 250R-SP MC18-II




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


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


TA20 Carburetor Type

Lubrication Seperate Pump (engine)
splash type (transmission)


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


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  1980 mm / 77.9 in
Width    650 mm / 25.5 in
Height  1060 mm / 41.7 in
Wheelbase 1345 mm / 52.9 in
Seat Height 790 mm / 31.1 in
Ground Clearance 135 mm / 5.3 in

Dry Weight

131 kg / 288.8 lbs
Wet Weight 149 kg / 328.4 lbs

Fuel Capacity

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

The 1989 NSR model went on sale February 10, 1989 for 608,000 Yen. The NSR was again updated but still classified a MC18 in Japan. Version 2 or the R5K for the standard R type NSR's, This time the all new MC18 got new bodywork, higher set silencers, new rear suspension, revised PGM II intake system, wider radial tires and for the third straight year saw the same fighting red and white colors, along with Terra blue colors and a slight variation with the red accented seat cowl. New colors in Black and gun metal grey debuted as well. Due to a large number of traffic accidents involving motorcycles. All NSR 250's were speed restricted from 1989. The option of the SP with lighter magnesium wheels, newly introduced dry clutch and all new colors was available for the price of 689,000 Yen. The SP model was sold in the Terra racing colors ( NSR racing sponsor ) of silver and white with green accents  The 1989 SP model also had fully adjustable front forks ( preload and rebound ) compared to the to regular R type which was adjustable for preload only. Also a whole new fully adjustable rear shock with reservoir. 1989 was also the first year for the dry clutch on street SP models. These NSR's were classified the R6K