You don't say if yours is still in warranty or not. If it is, take it in.
Mine did that when it was in warranty. They fixed them, though it took about 3 trips because all the little bulbs in there are different and they didn't have all them. When ordered the ones they didn't have, I went back but by that time another one had gone out. Since then they have stayed on for about 3 years. Now I'm out of warranty.
They all have little wires on them and I don't know if they plug in or what.
Them little buggers are expensive too... to replace all the bulbs on both handlebars is about $80 bucks just in bulbs! Not too hard to fix but they are small, and the work area is tight. Would suggest working under a lit magnafying glass if available.
I went to Radio Shack to buy replacements last year after I found out how much Mother Honda wants for her bulbs. I can't find the package that the Shack bulbs come in but after looking at their website I believe they are the 272-1092 which come two to a package for $1.79. http://www.radioshack.com/product/index.jsp?productId=2103780
There is some soldering that you will need to do, and the darned bulbs are small and kind of tedious to work with, but with a little patience and basic soldering skills you can get the job done and save some bucks.
I tried the smallest LED I could get my hands on at the time, a T-1 (3 mm), and it was too large to fit into the small channels that the bulbs go into. The little buggers that Honda uses are tiny. I agree that the LED would be the way to go, but I just couldn't get that fix to work.