Ducati Team confirmed after qualifying that Valentino Rossi will use his seventh engine on Sunday for the Gran Premio de Aragon, which means he will start the race from Pit Lane due to an Engine Durability rule infringement.
The current FIM Road Racing World Championship Grand Prix Regulations state that each rider is allowed six engines per season. Under the ‘Penalties for infringement of article 2.3.7 (Engine durability in MotoGP)’ section of the regulations, a rider will start the race from Pit Lane ten seconds after the race start if the infringement takes place before the race.
Those riders who qualified below Rossi in the qualifying session will all move up one position on the grid.
Source: http://www.motogp.com