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The Ducati Desmodromic system can be spun on the test bench with a snap of the fingers...literally.
Inertia keeps the valves moving quickly enough to seat fully even at idle speeds to eliminate the need for springs which the Mercedes cars used in the late 1950's.
Maintenance isn't a headache BUT you must know what you are doing , it take a lot of time AND it is very easy to get it wrong.
For the consumer this means higher service costs which not all are prepared to pay.
For Ducati it is as much a sales tool as it is an efficiency concern.
Look at the number of bikes not using it and that becomes very clear.
At the moment Ducati are the only builders using that system.
Pete.
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