And here, as if someone wants to calculate the displacement of a new engine ... and thus everything you need then, is different from the current engine ..
and the first weld, which you will not see on the animation ... that the minimum volume of the combustion chamber is 370 degrees of rotation of the main crankshaft ..
http://new4stroke.com/volume/volume.htm
http://new4stroke.com/volume/volume.xls
Andrew