Question about Harley Davidson FLHRCI Road King Classic Motorcycles

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Harley davidson 2001 flhri backfires through the intake

Pops on deceleration. while reving from idle it backfires through the air intake. idles real low

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Hi Anonymous, popping, coughing, spitting, or backfiring through the carburator or induction module is usually caused by air getting sucked in combustion chamber do bad intake seals leaking. Leaking exhaust gaskets can also be suspect. Remove air cleaner and backing plate, while engine is idling spray WD-40 or Brake Kleen around intake manifold to head area, if RPM's increase you have an intake leak and seals need to be replaced, also spark plugs will be burning whiter than normal. Good luck

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Posted on May 20, 2015

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Posted on Jan 02, 2017

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Anonymous

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SOURCE: Stage 1 Low rpm backfire

If you are running straight pipes they might not give you the right back pressure. This can be reolved by either going back to riginal pipes or instaling a bolt into the pipes about 5 inches in to make back pressure. Another thing? Did you have the bike's electronic ignition reset after you messed with it?

Posted on Jun 21, 2009

ollie reece

ollie reece-jones

  • 1167 Answers

SOURCE: no idle &bacfires on deceleration

hi mate on the carb you will find 2 screw 1 is for the idle and the over is for mixture the idle one will be the furthest out screw it in 1/4of a turns will the engine is running this will take the idle up on the engine and the backfiring is fuel in the exhaust not being burnt so on the over screw on the carb screw that in 1/4 of turns this will decrease the amount of fuel going into the engine if it still backfires screw it in 1/4 of turns again and see what difference it makes good luck

Posted on Aug 20, 2009

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Hi Anonymous, popping, coughing, spitting, or backfiring through the carburator is usually caused by air getting sucked in combustion chamber do bad intake seals leaking. Leaking exhaust gaskets can also be suspect. Remove air cleaner and backing plate, while engine is idling spray WD-40 or Brake Kleen around intake manifold to head area, if RPM's increase you have an intake leak and seals need to be replaced, also spark plugs will be burning whiter than normal. Good luck

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

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COUGHING is usually caused by an air leak in the intake system and will generally have the same telltale signs, a wet or damp build up of oil/gas seepage at the intake manifold to cylinder head or carburetor to intake manifold connection and in rare instances a worn throttle plate shaft and or seals.
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For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below and for more specific information or questions at no charge please feel free to contact me at xlch@mail.com. Good luck and have a wonderful day.
HELP coughing or backfiring through the carb and intake Harley Davidson...
https://www.carlsalter.com/pdfs/Harley%20Davidson%20%20Sportster%201986-2003%20Service%20Manual.pdf
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Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

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