Leave it to Technical Editor Kevin Cameron to start in 1862 with the first guy who conceived the four-stroke combustion cycle. KC proceeds with Editor-in-Chief Mark Hoyer on the journey to the combustion chamber we have today and why it's shaped how it is, flatheads to hemis, two valve, four valves and more valves! There's so much to cover in such a small space. Join us!<br /><br />Looking to buy? Get prequalified<br />https://octane.co/flex/1?a=171<br /><br />Become a Channel Partner: https://octanemedia.co/home/become-an-advertiser/<br />Listen on Spotify: https://open.spotify.com/show/6CLI74xvMBFLDOC1tQaCOQ<br />Read more from Cycle World: https://www.cycleworld.com/<br />Buy Cycle World Merch: https://teespring.com/stores/cycleworld
