DiscoverCycle World PodcastINSIDE THE HOT ROOM! The magic in your motorcycle engine's combustion chamber.
INSIDE THE HOT ROOM! The magic in your motorcycle engine's combustion chamber.

INSIDE THE HOT ROOM! The magic in your motorcycle engine's combustion chamber.

Update: 2025-07-30
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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!

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INSIDE THE HOT ROOM! The magic in your motorcycle engine's combustion chamber.

INSIDE THE HOT ROOM! The magic in your motorcycle engine's combustion chamber.

Cycle World