For example, engines with fewer cylinders are usually ... Here is where things get crazy. Honda decided on four oval pistons.

ForbesMoto Exotica For Sale: 30 Years Later, Honda’s Oval-Piston ‘V8’ NR750 Is Still ... and new-bike smell like Chassis No. 1 and Engine No. 3 of the NSR500V that just found a new home.

But it needed to generate the same amount of power, which is why it has distinct oval pistons ... was mounted directly to the engine, and a titanium exhaust with Honda’s HTEV exhaust valve ...