Just Re-discovered this website on rebuilding the Type IV--ahh brings back sweet memories.....
http://www.ephotomotion.com/914engine/index01.html

Thanks for this! I have not seen this one before.
I don't have a lot of engine experience so I always find these interesting.

was he ever a member here?

Wow, that looks like a great site…I always appreciate it when folks take the time to write-up projects like that...

Van is very instructive.
I followed his generator rebuild and it went like a dream, total cost new bearings and carbon brushed was about $15....and it works.