The Honda NR750 (1992) is a motorcycle with a four-stroke, 90-degree V-four oval cylinder engine that weighs 80.5kg and has a capacity of 747.7cc. It has a liquid cooling system, electronic fuel injection, and a computer-controlled digital ignition system. The bike’s transmission is a six-speed with a final drive chain. The frame is triple-square-section twin-tube, with front suspension being 45mm Showa inverted telescopic forks, and the rear suspension being a vertically-asymmetric Pro-Arm swing arm with Pro-Link nitrogen gas-filled damper with a reserve tank. The bike’s dry weight is 223kg, and it has a maximum weight capacity of 115.0kg. It can reach a top speed of 257.3km/h (159.8 mph), with a maximum power of 125hp (92 kW) at 14000 RPM and a maximum torque of 66 Nm at 11000 RPM. The bike has two front 310mm disc 4-piston caliper brakes and a single rear 220mm disc 2-piston caliper brake. The front and rear wheels are made of magnesium alloy, and the bike has a fuel capacity of 17 litres. It has a consumption average of 12.6 km/lit, and the braking distance (60-0 / 100-0) is 12.9m and 35.9m, respectively. It has a standing 1/4-mile time of 11.4 seconds and can reach a speed of 197.3 km/h. Road tests carried out on the motorcycle include Motosprint (1992) and Tuttomoto (1993).
Technical specifications:
Make Model: Honda NR 750 NR40 RC40
| Year | 1992 |
|---|---|
| Engine | Four stroke, 90 degreesV-four oval cylinder, DOHC, 8 valve per cylinder. |
| Engine Weight | 80.5kg / 177.5 lbs |
| Capacity | 747.7 cc / 45.6 cu-in |
| Bore x Stroke | 101.2 x 50.6 x 42 mm |
| Cooling System | Liquid cooled |
| Compression Ratio | 11.7:1 |
| Valve Train | Intake valve opens (@ 1mm (0.04 in.) lift) 20-deg. BTDC Intake valve closes (@ 1mm (0.04 in.) lift) 50-deg. ABDC Exhaust valve opens (@ 1mm (0.04 in.) lift) 46-deg. BBDC Exhaust valve closes (@ (0.04 in.) 1mm lift) 16-deg. ATDC |
| Lubrication | Forced pressure and wet sump with oil cooler |
| Induction | Electronic fuel injection 8x 30mm chokes, 2 injectors per cylinder |
| Ignition | Computer-controlled digital |
| Charging | Triple phase output alternator |
| Starting | Electric |
| Max Power | 125 hp / 92 kW @ 14000 rpm |
| Max Power Rear Tyre | 115.8 hp @14500 rpm) |
| Max Torque | 66 Nm / 6.6 kgf-m @ 11000 rpm |
| Clutch | Multi-plate, wet |
| Transmission | 6 Speed |
| Final Drive | Chain 525/ Link 108 |
| Primary Reduction | 1.937 (62/32) |
| Gear Ratio | 1st 2.666 (40/15) / 2nd 2.125 (34/16) / 3rd 1.777 (32/18) / 4th 1.545 (34/22) / 5th 1.381 (29/21) / 6th 1.381 (29/21) |
| Frame | Triple-square section twin-tube |
| Front Suspension | 45mm Showa inverted telescopic forks, preload,compression and rebound damping adjustment. |
| Front Wheel Travel | 120 mm /; 4.7 in |
| Rear Suspension | Vertically-asymmetric Pro-Arm swing arm with Pro-Link, Rear damper Nitrogen gas-filled damper with reserve tank |
| Rear Wheel Travel | 120 mm / 4.7 in |
| Front Brakes | 2x 310mm disc 4 piston calipers |
| Rear Brakes | Single 220mm disc 2 piston caliper |
| Front Wheel | 16×3.5 in. magnesium alloy |
| Rear Wheel | 17×5.5 in. magnesium alloy |
| Front Tyre | 130/70-ZR16 (Michelin TX11 radial) |
| Front Tyre Pressure | 270 kPa (2.70 kg/cm ^2; 39 psi.) |
| Rear Tyre | 180/55-ZR17 (Michelin TX23 radial) |
| Rear Tyre Pressure | 290 kPa (2.90 kg/cm ^2; 42 psi.) |
| Rake | 24 degrees |
| Trail | 88mm / 3.5 in |
| Dimensions | Length 2,150mm / 84.6 in. Width 700 mm / 27.6 in Height1,090mm / 42.9in |
| Wheelbase | 1435 mm / 56.5 in |
| Seat Height | 785 mm / 30.9 in |
| Footpeg Height | 360 mm / 44.2 in |
| Ground Clearance | 130 mm / 5.1 in |
| Dry Weight | 223 kg 491 lbs |
| Wet Weight | 244 kg / 537.9 lbs |
| Maximum Weight Capacity | 115.0k g / 253.5 lbs |
| Fuel Capacity | 17 Litres / 3.8 US gal |
| Consumption average | 12.6 km/lit |
| Braking 60 – 0 / 100 – 0 | 12.9 m / 35.9 m |
| Standing 1/4 Mile | 11.4 sec / 197.3 km/h |
| Top Speed | 257.3 km/h / 159.8 mph |
| Road Tests | Motosprint 1992 Tuttomoto 1993 |
