It seems like every time I turn around I'm replacing batteries for my lights, so I decided to make a lighting coil like the ones I had on my 50 cc motorcycles when I was a kid. I spent all day winding 18 gauge magnet wire on an old laminated magneto and fabricating a mounting plate to ensure that the coil was in line with the magnets on the flywheel and fit within the pull start housing. My incondescent headlight worked great with the coil, but the LED tail light will have to be replaced. Or, I might go to a LED headlight instead and add a rectifier. No more batteries (except for my vintage horn which might have to go if I do the rectifier thing).