The problem is that many of the manuals are in German such as the ones available from people such as RBO. I ended up getting one for a similar Sears Allstate bike which was good in all respects except that the wiring colour codes were wrong. I don’t know if your model was ever sold in the USA under Sears Allstate branding but it’s worth a look. Good luck with your project and please keep us informed as to progress. A few pics would be nice! Cheers……….Chris
some assembly required