Honda NSR 250R MC21 (1990)

The Honda NSR 250R MC21 is a motorcycle that was produced in 1990. It has a two-stroke, 90-degree V-twin cylinder, reed valve/exhaust valve engine with a capacity of 249cc/15.2 cu-in. The bore x stroke are 54 x 54.5 mm and it has a liquid cooling system with a compression ratio of 7.3:1. The motorcycle has a TA20 carburetor type and separate pump lubrication systems for the engine and transmission. The ignition system is a PGM-CDI and it is started by a kick. The maximum power output is 45 hp/32.8 kW at 9500 rpm, and the maximum torque is 35 Nm/25.8 ft-lb at 8500 rpm. It has a multi-plate, coil spring clutch and constant mesh 6-speed transmission, with a chain final drive. The aluminum tube type frame has a 41mm telescopic air valve semi-adjustable front suspension and a Pro-Link single shock swingarm rear suspension that is non-adjustable. The motorcycle has a front and rear disc brake system, with the front having 2x discs and 2 piston calipers and the rear having a single disc and 1 piston caliper. Its fuel capacity is 16 Litres/4.2 US gal and it weighs 132 kg/291.8 lbs dry and 151 kg/337 lbs wet. The Honda NSR 250R MC21 has a Type I/Type II/Technical/NSR250.net review and is 1975 mm/77.7 in long, 655 mm/25.7 in wide, and 1060 mm/41.7 in high, with a wheelbase of 1345 mm/52.9 in, and a seat height of 770 mm/30.3 in, and a ground clearance of 135 mm/5.3 in.

Technical specifications:

Make Model: Honda NSR 250R MC21

Year: 1990
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
Review: Type I / Type II / Technical / nsr250.net