Honda NSR 250SP MC21 (1991-92)

The Honda NSR 250SP MC21 is a two-stroke motorcycle with a 249 cc V-twin engine, capable of 45 horsepower and 35 Nm of torque. It has a kick-start ignition system and a constant mesh 6-speed transmission with a chain final drive. The frame is made of aluminum tubing and the suspension consists of a 41mm telescopic front fork and a Pro-Link single shock swingarm in the rear. The brakes consist of two discs with 2-piston calipers in the front and a single disc with a 1-piston caliper in the rear. The motorcycle has a 23 degree 15 rake and 87 mm trail with a length of 1975 mm, a width of 655 mm, and a height of 1060 mm. The wheelbase is 1345 mm and the seat height is 770 mm. The dry weight is 132 kg while the wet weight is 151 kg with a 16 liter fuel capacity. This motorcycle was produced in 1991-92 and is known for its high performance on the road.

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Technical specifications:

Make Model: Honda NSR 250SP MC21

Year: 1991 – 92

Engine: Two stroke, 90 degreesV-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 degrees15

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

Related Links: Type I / Type II / Technical / nsr250.net

Road Test: Motosprint 1991