http://mvvs.nl/ is where I went for information on my 58cc. There is a lot of information there. In addition, there is a Gas Engine forum here where you can locate even more information. I strongly suggest that you power your ignition with a 2S Lithium pack. That is what I use, and my research convinced me that a 5-cell NiCad or NiMh pack would not get the job done.
Fly safe, Glover
Also check out the MVVS Support forum.