The World's First Oval Pistons Developed By Honda - iMotorbike News
Speed Physics - In 1990 Volkswagen tested an oval piston version of their 1.6 liter diesel engine bringing it to 2.3. Not much is known about it. Rumours are that they wanted
Fingers Oval Bowl Race Cast Performance Duramax Piston Set
The Honda Oval Piston
YouTuber explains why Honda's oval piston engine is absolutely crazy
Here's How (And Why) Honda's Oval Piston Bikes Worked