I'm running a GM 4 pin ignition module on my R100S as a points booster.
As per this web site: http://home.comcast.net/~loudgpz/GPZ...ForPoints.html
I mounted the module and the inverter on a heat sink piece of aluminum on the rear glove box under the seat cowl. Got about 500mi. on the setup so far with no problem. With the switch of two wires and reconnecting the condenser it goes back to points only.
Steve 01GS 78S