Unlike its name, nothing is easy with this bike. Son asked me a month ago to rewire some ratty wiring. From the stator to the voltage regulator to coil. Now machine has no spark. Any one have a schematic or a picture they could post. I've tried looking it up online but with little headway.

Also where would one find a rear master? Online, I cant seem to find the exact same one...

Contact Mike Komer at the Tryals Shop in NY.  He still has a bunch of these he keeps going for customers.

http://www.tryalsshop.com/

Thank you nhuskys for the lead. Mike was a wealth of knowledge and had one last rear master in stock. As for the wiring, it seems the issue was in the analog control module under the rear seat/fender. I removed it this afternoon and ram the wires from the stator directly to the coil. A few kicks later the bike was running. So happy to see my son riding the bike again...

I'm glad that it worked out!