249cc 90° V-Twin Liquid Cooled Two-Stroke
|Top speed||185km/h(45HP) 215km/h(60HP)|
|Power||45HP @ 9500 rpm (60HP when de-restricted)|
|Torque||37Nm @ 8000 rpm|
|Transmission||Six Speed constant mesher|
|Brakes||Drilled vented discs front and rear|
Front: 110/70 × 17"
|Rake, trail||23° 15', 87mm|
|Fuel capacity||17.2 litre|
|Oil capacity||2.1 litre|
The NSR250 series of two stroke motorcycles were manufactured between 1985 and 1996.
1985 NSR250R MC11 Rothmans 1987 NSR250R MC16
1988 NSR250R MC18 R2
1988 NSR250R SP R4 Rothmans MC18
1989 NSR250R MC18 R5
1989 NSR250R SP MC18 R6
1990 NSR250R MC21
1990 NSR250R SP MC21
1991 NSR250R MC21
1991 NSR250SE MC21
1992 NSR250R MC21
1992 NSR250R SP MC21
1992 NSR250SP Rothmans MC21
1993 NSR250SE MC21
1994 NSR250R MC28
1994 NSR250R SP Rothmans
1994 NSR250SE MC28
1995 NSR250R SP HRC
1996 NSR250R SP Repsol
1996 NSR250SE MC28
Configuration: 90° v-twin
Displacement (cm³): 249
Mass (kg): 132 (dry)
Rider seat height (mm): 780
Power (kW (hp)): 32.8 (45)
The engine is a 249cc 90° V-twin liquid cooled 2-stroke with crankcase reed valve induction via twin naturally aspirated carburetors.
Bore and Stroke: 54mm × 54.5mm The gearbox is a 6 speed constant mesh cassette type with multi-plate wet clutch. The MC18 crankshaft was sold as a complete assembly by Honda. Hence, individual crankshaft components were not readily available making it very difficult to rebuild the crankshafts. This crankshaft part is no longer an available part from Honda, which can make restoration of these machines difficult. However, these types of parts can often be found in the aftermarket.
The engine is the same as the R5k. The only difference is that it has a dry multi-plate clutch.
Front: Twin telescopic forks. Oil filled damper with spring preload adjustment only.
Rear: Single rising rate shock. Pro-Link with external coil. Variable spring preload adjustment only.
Front: Twin telescopic forks. Oil filled damper cartridge with spring preload and rebound damping adjustment.
Rear: Single rising rate rear shock. Pro-Link with external coil. Gas/oil damper with variable spring preload. Rebound and compression damping adjustment.