I've had my fair share (twice) of the springs failing, causing all kinds of "interesting" situations around the primary gears and clutch. It has been a problem for some owners with APTC wet "slipper action" clutches - typically found on low output 2V engines.
Like this: http://www.ducatimonsterforum.org/index.php?topic=57496.0 (http://www.ducatimonsterforum.org/index.php?topic=57496.0)
Maybe Ducati found a way to deal with this, maybe not... but surely they wouldn't risk it in a SBK [coffee]
From a box of Pani parts :o
(http://i329.photobucket.com/albums/l394/stopintime/PaniclutchCognac004_zps6854059c.jpg)