Just ahead of the final preseason MotoGP test of 2013, Yamaha Factory Racing launched Friday its 2013 colors at Jerez de Lap Frontera Circuit in Spain.At the track, which will host the final MotoGP preseason test Saturday through Monday (March 23-25), the entire team was present, along with riders Valentino Rossi and Jorge Lorenzo.Rossi departed with Yamaha ahead of the 2011 MotoGP Championship, the nine-time World Champion joining the Ducati Team. But the last two years were anything but good for Rossi, and he rejoined the factory Yamaha team. This will be his eighth season on Yamaha machinery.Jorge Lorenzo joined the factory Yamaha squad in 2008, and has achieved to titles on the YZR-M1 – the first in 2010, the more recent in 2012. Lorenzo will be looking to replicate his 2012 MotoGP performance when he won six races, and finished either first or second in all races with the exception of two DNFs.Attached above is a photo gallery of the YZR-M1. These pics also make great wallpaper. Stay clicked to UltimateMotorCycling.com for separate galleries of Rossi and Lorenzo aboard their perspective motorcycles.