It’s called Desmodromic valve control. An engineering solution found on only one motorcycle – Ducati. Most motorcycle engines rely upon conventional springs for valve closure, but as rpm increases, the time taken for the spring to close the valve becomes critical. Failure of the valve to follow the precise profile of the camshaft results in loss of perfo rmance. Ducati's Desmodromic valve system eliminates the spring and actuates valve closure mechanically. The result is safe, exact valve timing at all engine speeds. Every Ducati motorcycle, including our World Superbikes and the MotoGP Desmosedicis rely on the Desmo system.
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