
2009. I was lucky and could spend some time with an RC40 the Honda NR750. I took some pictures for the memories. Toymans SuperBikegarage From Wikipedia, the free encyclopediaJump to: navigation, search Honda 750 NR oval pistonsHonda's NR (New Racing) V-four motorcycle engine series started in 1979 with the 500cc NR500 Grand Prix racer that 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 throughput and compression. In 1992 Honda produced around 300 street versions of a 750cc model, the NR (often mistakenly 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 when it was selling for $50000 and with the rarity, nowadays they rarely change hands.
NR750
NR
750
New
Racing
HRC
Honda
V-four
oval
pistons
NR500
Endurance
Racer
Grand
Prix