I solved the two speed problem with a Fichtel & Sachs Torpedo Duomatic 2 speed kickback hub with a coaster brake.There is a 36% difference between the gears. It is mounted on my 1980 LeJuene Track Bike.
It is pictured here: http://www.bikeforums.net/showpost.p...ostcount=20010

Unfortunately they have not been made for almost 25 years. I found mine on an old used bike ten years ago. And just this week a dumpster diving bike friend found a discarded very old 20 inch wheel bike with another one of the F&S hubs in excellent condition. Time for another bike project. Maybe a 2spd 29er! Good luck hunting one of these hubs. You will need it.