Question about Harley Davidson FLSTC - FLSTCI Heritage Classic Motorcycles
Aftermarket pipes tend to lower back pressure, this will cause the fuel/air mix to lean out and result in the "popping" you hear---Backfiring, is extremely rare these days with electronic ignitions and the high reliability of engines. Real backfiring means the engine is not properly timed and the fuel/air mix is getting a spark and ignition at the wrong time (when the intake valve is open). Real backfiring is actually the bike "spitting up" in a sense, backwards through the carburetor or intake.You can check for exhaust leaks up around the cylinder heads by putting on some gloves and covering the exhaust tips momentarily. I have seen exhaust leaks that will make the popping worse by allowing air to be sucked in during deceleration...Hope this helps.
Posted on Jul 03, 2011
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Posted on Jan 02, 2017
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