I'll have to look for some online service manuals for some pre-purchase data. The sachs engines seem to be pretty plentiful on ebay in Europe. If anyone has any other recommendations please let me know.
Thanks for those links technocyclist! I am getting excited about an alternative powersource. That little boxer twin is cool, but pretty wide. And those spark plugs! I saw a video on youtube that inspired me to look up Motomorini. They have quite a selection of nifty 50cc engines.
Morini Motori
Any further suggestions are welcome