Originally Posted by plugeye
love it. no battery = nirvana
I replaced the battery with a 2200 uf capacitor rated for 35V (RadioShack, $5).
Sorry, no pictures, but it's an easy process: cut the battery leads, solder in the capacitor (note the + and - sides on the cap), and wrap it all in elec tape. It worked great, at idle the headlight doesn't flicker at all.
[NOTE] Late last summer, my neutral light stopped working below 4k RPM and my RPM gauge was acting funny was well. I turned out to be a broken connection with the cap. I've made the new connection more durable so hopefully I won't have the problem again.