This article is a summary of a YouTube video "Why ONLY Ducati Uses This Part To Go Fast" by Donut

The Ingenious Ducati Engine: Exploring the Desmodromic Valve System

TLDRDiscover the secret behind Ducati's high-revving engines with the ingenious desmodromic valve system. Learn how it works and why it's not commonly used in car engines. Find out how the desmo allows for higher revs, ensures valve sealing, and creates a unique engine sound.

Key insights

⚙️The desmodromic valve system is the secret behind Ducati's high revving engines, allowing them to reach impressive RPMs.

🔊The desmo creates a unique engine sound characterized by the metal-on-metal valve closing, differentiating it from engines with valve springs.

🏍️Ducati has been using the desmodromic valve system since 1956, primarily in their flagship bikes, showcasing its effectiveness.

🧰The desmo requires precise engineering and additional components like inverted rocker arms and poppet valves to achieve accurate valve opening and closing.

💥While the desmodromic valve system is impressive, its noisy operation and potential for wear limit its application in car engines.


Why do Ducati engines rev higher than other engines?

Ducati's high revs are made possible by the desmodromic valve system, which eliminates valve float and allows for precise valve opening and closing.

Does the desmodromic valve system affect engine performance?

Yes, the desmo improves performance by ensuring optimal valve sealing, preventing power loss, and allowing for higher RPMs.

What makes the sound of a desmo engine unique?

The desmo's distinctive sound comes from the metal-on-metal valve closing, resulting in a rougher and more aggressive engine noise.

Why don't more car manufacturers use the desmodromic valve system?

The desmo's noisy operation and potential for wear make it less suitable for everyday car engines, where comfort and durability are prioritized.

Is the desmodromic valve system exclusive to Ducati?

While Ducati popularized and extensively uses the desmodromic valve system in their motorcycles, Mercedes-Benz also employed it in the 1950s for their Formula 1 cars.

Timestamped Summary

00:00Introduction: The Ducati engine is known for its high revs achieved through the desmodromic valve system.

05:13Explanation of the desmodromic valve system and comparison to traditional valve train setups.

10:02Advantages and challenges of the desmodromic valve system, including unique engine sound and potential wear.

11:31Absence of the desmodromic valve system in car engines due to noise concerns and wear issues.