Funny thing happened the other day. I rode home from work in the dark on Wednesday and my low beam worked fine, yesterday headed off to work, no low beam but high beam worked fine.
Today I had a day off so I started to check out what the story was, checked the low beam fuse, all okay, decided it must be the relay so I pulled the plastic off the front of the bike and checked out the relay, definitely working okay.
Finally got an old H4 bulb pulled the connector and plugged it in, voila it worked. So both low beams had blown at the same time, I can't understand why this would have happened, the bike hadn't been jump started or had any electrical issues at all. I guess I should have checked the bulbs before I started pulling the bike apart but I couldn't really believe both bulbs would die at the same time.
Went down to Supercheap and got some new bulbs, 15 minutes of fiddling around and I once again have low beam.