What makes it rotate to the right, and not to the left?

Tags: Ask 9GAG, engine combustion, piston, machine

3304 points, 604 comments.

http://9gag.com/gag/a8qM1NZhttp://9gag.com/gag/a8qM1NZ0001-01-01 00:00:00Z2022-10-28 11:40:36Z