Got fire, but timing was way off. Gotta figure something out given the CDI prices for these.
I believe this is what I had initially and had no fire, then swapped 6 and 1 and had fire for a minute with timing way off - $8 CDI might be dead:
Pin 6: Tagged into AC on a yellow wire from magneto
Pin 2: coil
Pin 1: blk/red (Magneto)
Pin 4: ground
Pin3: Open (grounded to 3)
Pin5: kill switch
There are so many different wiring diagrams for the GY6 boxes. No idea what is correct, but at $8 it's not the end of the world.