Just came across some a very excellent Moki information source. Olivier Rogeau of France has a business named, "Modelisme Micromoteurs Service". He has begun posting a series of videos of a Moki 250 in overhaul and repair. Link to these videos is located on his Facebook page at:
www.facebook.com/ModelismeMicromoteursService
The video are spoken in French, but one can still follow well enough. There are also many photos to go with the videos.
Regards - J Tab