It is a MOKI but it is manufactured in Germany (Airworld Modellbau). There is no relation to the Hungarian MOKI brand.
http://www.airworld.online.de/Englisch/Index.htm

These are high quality - high performance engines and you will get a lot of reliable use from it.
The engines can be switched to either side or rear exhaust by changing the piston and rotating the cylinder through 90°

Should you ever need to replace the ignition this is the colour code
White = Red (positive)
Brown = Black (negative)
Green = White (signal)

I have included a photo of one of mine…….it is a 45cc rear induction (disc valve) rear exhaust.
Also you can see how your ignition looked like before it was "relabled"




They have a generic user manual that I have attached as well FYI


mike