Honda NR

Honda NR

Manufacturer	Honda
Engine	747.7 cc (45.63 cu in) 4-stroke 90° V4 oval-piston, DOHC , 8 Valve per cylinder Individual gear driven cam banks per cylinder.
Bore / stroke	101.2 mm / 50.6 mm × 42 mm (4.0 in / 2.0 in × 1.7 in)
Compression ratio	11.7:1
Top speed	159.8 mph (257.2 km/h)
Power	115.8 hp (86.4 kW) @ 14,500 rpm
Torque	66 N⋅m (49 lbf⋅ft) @ 11,000 rpm
Transmission	6 Speed
Wheelbase	1,435 mm (56.5 in)
Dimensions	L: 2,150 mm (84.6 in) W: 700 mm (27.6 in) H: 1,090 mm (42.9 in)
Seat height	785 mm (30.9 in)
Weight	223 kg (492 lb) (dry) 244 kg (538 lb) (wet)
Fuel capacity	17 L (3.7 imp gal; 4.5 US gal)

The Honda NR (New Racing) was a V-four motorcycle series started by Honda in 1979 with the 500cc NR500 Grand Prix racer which used oval pistons.^[1] This was followed during the 1980s by a 750cc endurance racer version known as the NR750. The oval piston concept allowed for eight valves per cylinder which generated more power due to the increased air/fuel mixture and throughout compression. In 1992 Honda produced around 300 street versions of a 750 cc model, the NR (often referred to as the NR750), with a 90-degree V angle. Whereas the NR500 had used an oval piston with straight sides, the road going NR750 used an elliptical piston with curved long sides. The bike became the most expensive production bike at the time, selling for $50,000.