The stock headlights on my SV are pretty crap so decided to spend a few bucks to upgrade them. $35 delivered I paid for the pair of H4 bulbs. Quick pictures to show the difference; Much whiter. Haven't tested it yet, may later tonight. I've decided I need to replace the parking light now, looks way too yellow when next to pure white More detailed instructions http://www.svdownunder.com/index.php?topic=18099.0 But thats for my SV, but of course most bikes will be very similar in terms of replacing them.