So it looks like the part is called switch box assembly. anyone ever had this go bad? or better yet have one laying around? $452.00 is alot of coin to not have it be the problem.. gt you out there?

Were you wacking the weeds in the launch ramp area?

Well...Since you put me on the spot on the rocker thread 

J/K...So check this out, the way these freaks of mechanical wonders work is.....

As the flywheel spins, there is a charge coil magneto that makes voltage for the CD box to build up and store...The typical voltage to the box is about 30 volts while cranking......Once at the CD, it is stored long enough to make about 300 volts, then it is switched to the ignition coil which produces over 40,000 volts....Viola! a spark...

Now here is the problem...It takes a special tool to detect the voltages at each point. I have one, most shops will do the troubleshooting for an hour of labor, this changes if it is intermittent, those are a bitch 

Now with all that being out of the way....A lot of the time, if you check spark and all of the cylinders have a very faint almost non existent spark that spreads about 1/32" (has to be fairly dark to see) the magic box is toast...

If there is no spark at all, either the ignition switch is shorted, or the charge coil is dead...

If only one (or two) cylinders is dead, it is the coil on that cylinder..

Disclaimer;  This is very non technical and non proven, but may get you in the park...

If you are unsure of the diagnosis, have a shop take a look see, the box is electrical and non returnable if it no fixie...

FWIW, they do take a dump....Make sure and disconnect the ignition switch "M" wire to ensure it is not something silly, your motor may be too old for a kill switch, but look there too....These shut off by grounding the mag coil from making power at the box, always a good place to start..

I can loan you my mag box if needed....Lemmeknow.

GT