Originally Posted by
Grim
WOW you know not much about bikes and good vintage bikes.
Bottle generators are still readily available.
http://www.peterwhitecycles.com/dymotec.asp
In Europe they are very popular and in fact standard equipment on many bikes since it is the law to have lighting at night in many countries. They don't like feeding batteries to the lights.
I have a B&M Dymotec 6 that I purchased from Peter White. It is mounted on my Cross-Check which is parked outside my office right now. It works great. I've even used it on early morning group rides in the dark. It does add a bit of resistance at 32mph while trying to bridge up to a break!
I just wish more forks were built with generator mounts on them.