Sorry to hijack this discussion but I am having the same problem. 2005 Softail. Only mod is a K&N air filter. How do you check for exhaust leaks?
did the backfiring just start recently or has it always had the problem?Did the glove thing and there seems to be no exhaust leak. I dont wanna keep it covered to long. I also sprayed wd40 around the carb and intake and there was no noticable increase in the rpm. Any other ideas????