For a coil test you could try.....
The wire that plugs onto the coil unit itself connect the red terminal of your multi meter to it and connect the black to earth, kick it over and see if your getting an AC voltage from that wire.
If there is no AC voltage from that wire then go back to the CDI unit.
Find the wires coming from the stator into the CDI unit connect the muti meter to them in the same way and check for an AC voltage again.
If there is a voltage to the Coil but no spark then the coil is either badly earthed or shot. Or damaged plug cap possibly.
If there is a voltage to the CDI but not the coil then the CDI is shot, or badly earthed.
If there is no voltage to the CDI from the stator then the stator is at fault.
Make sure to disconnect the kill switch and try that first. Leave the kill switch disconnected while you try the rest too just to be sure.
Hope that makes sense.
That's what I would do if we're me.