Thanks for the links Doug, that is exactly what I am in need of. All I have is the magneto gear, the small pinion on the dynamo, and the bearing in the timing cover. No threaded collar, slip cone, spring, gear, and extension shaft. Since it is unlikely that someone will have one, can you send me the drawings for the various parts so I can make/have them made. One thing I was wondering is how necessary the slip clutch is, would the system be ok without the ability to slip? It certainly would be a less complicated part to make without the cone and spring assembly.