The Honda NR (New Racing) is 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.

Nov 1, 2022 · Coolest Sportbikes of the ’90s: 1992 Honda NR750. This oval-piston streetbike flaunted technology like no bike before or after.

Feb 26, 2023 · It was the first production motorcycle to feature oval-pistoned engines, a revolutionary design that allowed the bike to produce more power than any other 4 cylinder.

Nov 11, 2021 · Read about the Honda NR750, an oval piston 8-valve V4 powered motorcycle and why it was designed and built here.

The NR series by Honda, including the NR500 and NR750, failed in racing but left a significant mark on motorcycling history.

Jun 13, 2017 · The Honda NR750, aka RC40, was the first — and so far the only — opportunity for even a few wealthy customers to experience the fruits of Honda’s high-profile focus on pursuing the holy grail of oval-piston engineering.

Feb 12, 2025 · The Honda NR750 was a superbike ahead of its time. Featuring oval pistons, 32 valves, and an 8-spark plug system, this V4 engine delivered V8-like performance in a compact package. Though it never became mainstream, it remains …

With a rev limit of 15,000rpm and an advanced fuel-injection system, the NR750 produces an impressive 125bhp (although pre-production prototypes were capable of 140bhp and the racing bike on which the NR is based was making more than 160bhp).

Mar 12, 2023 · Honda is responsible for a long list of iconic and industry-changing motorcycles, but perhaps their most daring creation was the 1992 NR750, a limited-production halo machine with an exotic...

May 23, 2013 · 1992 Honda NR750: One of the most audacious motorcycles ever, the Honda NR750 used oval pistons with dual connecting rods.