[ADRENALINE RUSH]

speakers on the bike is not the way to go. you will put em in and then realize i you cant hear it over the bike and through your helmet.....
here are some links on how to install speakers in your helmet.......

better but more difficult way
http://www.r6-forum.com/forums/showthread.php?t=58748

quick and easy way
http://www.r6messagenet.com/forums/showthread.php?t=38756

oh yeah if you insist on getting thoses speakers just buy your freinds gsxr or for even better sound my grandfather has a goldwing for sale, those speaker sound real nice!!!!!:hammer