How good of condition are your boots and wires? First thing I would try next before getting into the rest of the electrical stuff ( cdi, coil, stator, pickup coil) is trimming some of the wire off of the cap wires.
Unscrew the boots from the wires, cut an 1/8 in. off, grease them and screw the boots back in and see if that does anything. Also I would buy a clymer manual if you are not familiar with banshee motors or components.