You have to check out this engine!

Posted by Daddyman on Oct 21, 2011; 3:04am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/You-have-to-check-out-this-engine-tp3439806.html

2 cylinder with 4 pistons!!

http://thekneeslider.com/archives/2009/12/21/ecomotors-opoc-two-stroke-engines-opposed-piston-opposed-cylinder/