It will make your bike handle like a garbage truck. You will inexplicably crash often (cause guys like me that value a little peace will crash you if you play that gangster rap crap with all that cussing anywhere near my grade schooler).

Watch the banners at the top. There is a small speaker system that clamps to the stem that weighs less then a pound that shows up in the banners often. That wont effect your handling much at all.

IPOD sound speakers <--key words to get the banner to pop up.