Motorcycle Repair: shovelhead ingition problems, rear cylinder, dual fire

Question
QUESTION: I have a 1975 flh dual fire points ingition.I keep losing fire on the rear cylinder. i checked the plugs,wires,tested the coil reset the timing the bike started right up was running great went for a ride came back was still good . Shut the bike off went in the house for 2 hours came back out bike running on font cylinder great rear cylinder cutting in and out .Don't know what to check next. I cant seem to keep a coil on the bike for more than 5000 miles and i will lose fire on the rear head WHY? Any info who be much appreciate thanks.

ANSWER: Change out the condensers and let me know if that does it
Mike

---------- FOLLOW-UP ----------

QUESTION: I changed out the condenser.
got the bike to run for about one minute when it started it was running on the front head then the rear one kicked in sounded good for 30 seconds than rear head started to kick out again. Thinking about changing over to single fire electrical to much trouble with points comments?

Answer
the only thing that can cause your problem is either a bad coil, bad plug wire, bad condenser or points not set right or burned. I would test the plug wires and coil again. Make sure the plugins on the wires are clean and the holes in the coil are clean
Good luck and happy riding
Mike