Dan,
Another option for E.I.'s is the Pazon Sure-Fire which works very well with stock 6 volt coils...(if your battery was below 12 volts). Pazon sorted the Ignition Module to still operate at lower Voltage rates before Boyer finally got off there butt and updated to the Mk4.
It is very similar to a Mk4 Boyer, maybe a little nicer in appearance. The Trigger Assembly is a little nicer made, and the Ignition Module is slightly more compact. They are about $10-15 more expensive than the Boyer Mk4. At least here in Canada. You strobe the timing at 4000 RPM instead of 5000 for the Boyer. I have this unit and have had no issues for over +50,000 miles.
They also carry a variety of E.I.'s so you can check them out. I have used and installed both but my choice is the Pazon Sure-Fire IMHO, and both would be safe for your e-start.
As Stated above in post #28 Electronics don't like a lot of heat under the Points cover. but others can give their experience with their choice of E.I.'s. YMMV.
Overview of Digital & Analogue Ignition Systems. Classic bike & car electronic ignitions for road & racing.
www.pazon.com
Cheers,
Tom