| MODEL | HONDA NSR 125F-II 1991 |
| Year | 1991 |
| Engine Type | Two stroke, single cylinder, reed valve induction, RC exhaust valve |
| Displacement / Capacity | 124.8 cc / 7.6 cu in |
| Bore X Stroke | 54 x 54.5 mm |
| Compression Ratio | 6.8:1 |
| Cooling System | Liquid cooled |
| Max Power | 23.1 kW / 31 hp @ 10500 rpm |
| Max Torque | 20.85 Nm / 15.1 lb-ft @ 9000 rpm |
| Ignition | Capacitor discharge electronic ignition |
| Induction | 28 mm Dell'Orto PHBH 28 FS carburettor |
| Start System | Electric & kick |
| TRANSMISSION SPECS | |
| Lubrication | Separate oil lubrication |
| Gear Box | 6 Speed |
| Clutch | Wet multi-disc |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Aluminium twin-spar |
| Front Suspension | 35 mm Marzocchi telescopic fork |
| Rear Suspension | Pro-Link monoshock, Marzocchi damper, adjustable preload |
| Front Brakes | Single 316 mm disc, 2 piston caliper |
| Rear Brakes | Single 220 mm disc, 1 piston caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 800 mm / 31.4 in |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 129 kg / 284 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 100/80-17 |
| Rear Tyre | 130/70-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 10 Litres / 2.6 US gal |
| Fuel Consumption | 18.0 km/l |
| Top Speed | 160 km/h / 100 mph |
The F-II continued into 1991 without significant change, keeping its six-spoke wheels, AIS air intakes and detuned engine. It was the last of the first-generation naked NSRs before the Raiden (JC22) replaced it in 1992.
