Silverstar is what I have, great bulb, don't even need high beam riding in the dark, be aware of short life span tho, I almost have to change it every year lol.

 

I put a Silverstar Ultra (9004 I think) in right after I got the bike and its been working just fine for almost 3 years now without a hiccup. Might not be as nice as the Bosch VW setup or the PIAA, but they are easy to find locally (in case I need one fast), relatively inexpensive and work MUCH better than what the factory put in.
Wonder who the nitwit was who ordered Birthday cake candles instead of real light bulbs they have using in the stock headlight assembly.