Wolf Brand RX-50 is a scooter - not a moped - perhaps a scooter forum will have scooter folks who could direct you to efficient attempts at repair.
Generally speaking, if you can check the trigger coil for the correct impedance with an ohm meter, also check the exciter coil with the ohm meter, check the external coil as well. Check that the kill switch is not shorted to be grounded all time. Verify you have electricity going to the coil (some will not run without a battery). Perhaps find someone else who has a Wolf Brand RX-50 and interchange CDI to verify the box.
But seriously try a scooter forum as best for details and a more friendly atmosphere.