Officially Official: Piaggio MP3 400 and MP3 500 - Autoblog
Amazon.com: Areyourshop Regulator Rectifier Voltage Fit For Aprilia Atlantic 125 250 ie 500 Sprint4, for Piaggio MP3 400 2007-2011, XEvo 400 2007-2012, for Derbi Rambla 250 i 2008-2011 : Automotive