Ok I just looked at the scematic..
Connect the black/white wire from the ignition coil(the box the spark plugs wire comes out of) to the black wire from the stator.
Then use the decomp to kill it.
If you still don't have spark clean the points, if still no spark. wire in an external condenser. The condenser wire can attach anywhere on the two connected wires from the step above, and the body of the condenser needs to be grounded to the moped frame..
You can use any car condenser, I get them from AutoZone any condenser with one wire and a grounding strap will work. Think vw beetle...