i see lighting coils for cheap but no cheap souce coil
help me understand the 2 lighting coils?  there are 4 wires coming from stator.  all i think i know is the black goes to ignition coil.
whats a test to know if my source coil on stator is good or bad?
plus i bought a new ignition coil on
i want to get the vape or dynamo 12v but its super expensive around 600 or 700 after tarrif.  i wish they were not so expensive.  
i let bike sit outside to long and spark disappeared but i once had a spark.  any ideas?
im kinda waiting ok a kick start pedal as i seem to strip them out easy.  and on my xs400 project im waiting on new valve adjustment screw as the tops of them were super fragile.  too fragile for a motorcycle in my opinion but hey im learning.
 

Clean your points.

New aftermarket ignition coils often don't work.