Because we are discussing spark I would suggest identifying your CDI unit. That will give you a clue as to how the ignition is wired.
The two main types are:
The small unit as seen here:
http://www.partsforscooters.com/150-...9&category=393
Larger one here:
http://www.partsforscooters.com/CDI_...ategory=123337
I am told that this is the CDI you should have?
http://www.telecable.es/personales/a...I%20qingqi.jpg
Post #2 here outlines what/where and some internet trolling may turn up a wiring diagram:
http://www.mychinamoto.com/forums/sh...facturer-Links