Vintage Ducati Question - Chicagoland Sportbikes
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post #1 of 4 (permalink) Old 03-21-2011, 09:40 AM Thread Starter
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Vintage Ducati Question

Just out of curiousity......The first 'desmos' came about in 1956, yet spring actuated valve operation was still used through the late 60s on many of their motorcycles.
Why? Was desmo actuation only used for their more sportier line of bikes and older spring valve technology used for more of their cheaper/low-budget/everyday-use models?

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post #2 of 4 (permalink) Old 03-21-2011, 03:03 PM
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Good question. Another good question is what advantage does Desmo give to the valve train. I would imagine if there is a real advantage, others would copy it. It just seems over complicated and maintenance prone, cool too though.
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post #3 of 4 (permalink) Old 03-21-2011, 03:16 PM
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with the desmodromic valve system, valve float at high rpm is eliminated because the valve is directly controled by the cam adn levers rather than a spring

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post #4 of 4 (permalink) Old 03-21-2011, 09:30 PM
 
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Yes, but with modern valve springs the benefits of a desmodromic system no longer are worth the cost, and hence why normal systems can rev higher that Ducs. Ducati keeps it for the same reason Mazda keeps the Wankel - there's a following and it sets their products apart.

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