If you can find it, romove the wire from the kill switch to the points, just in case it is shorting to ground somewhere. If you have an ignition switch that connects power to the ignition, bypass that as well. Look for any wires/connections which may be marginal and fix or bypass them.
Buy a can of circuit cooler from Radio Shack and when the ped dies, spray the coil or the condensor with circuit cooler and see if that fixes it faster than normal cooling. You can also do the reverse and heat components with a hair drier to see if you can make them fail.