Bike made in Borgo Panigale factory in Bologna has a new 1000 ccm engine with power around 250 HP, which corresponds to a new rules in the MotoGP class for 2012 season.
The name is derived from atypical engine valve system, so-called desmodromic (valves are opened and closed by camshaft). Sedici is "sixteen" in Italian and indicates the number of valves in the engine.
source: motomatters.com