can ban si 4valllllllllllllllllllllllllllllllllllllllllllllllll http://www.bikervietnam.com/bfrm/showthread.php/463685-c%E1%BA%A7n-b%C3%A1n-chi%E1%BA%BFc-sirius-4val-%C4%91%E1%BA%A7u-l%C3%B2ng-ex