It's powered by ZS only. L4Z is http://www.fuxin.cc/vehicle/index.asp. Those Zhejiang maker often had the worst workmanship - EVERYthing brokes expect ENGINE which outsource from BiG players.
Search for this http://en.wikipedia.org/wiki/Honda_CT110 model which similar to yours engine.
http://hondatrailcts.yuku.com/ IS one of those sites
http://www.hondampe.com.au/docs/owni...CT110-2005.pdf had the 12V wiring diagram