Backfire
11-17-2009, 07:02 PM
Join Date: Sep 2009
Location: Mustang OK
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Backfire
Help! 2005 Sporster, carburated (but some of you already knew that) after acceleration it backfires. Just started. Cause????
11-17-2009, 07:14 PM
Join Date: Aug 2008
Location: Michigan
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Exhaust tight? Battery Cables tight? Hi Octane Gas? Any other symptoms? Idle speed change, running rough at idle, or ruogher than normal while warming up? Also can you recreate it while not riding? (Rev her up to 5 k, then let off) Did flames shoot outta yuor exhaust with the back fire? Help us out here.
11-17-2009, 07:33 PM
Join Date: Oct 2009
Location: Scottsboro
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Changed exhaust lately? That is when you usually start to notice it!
11-17-2009, 08:51 PM
Join Date: Sep 2009
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everything is tight. it only does it when the weather is cold. i cant make it do it when im just sitting. has to have a load on it.
11-17-2009, 09:52 PM
Join Date: Nov 2007
Location: SoCal
Posts: 47,717
Sounds like it may be an intake or exhaust leak as when it is warm out everything expands.
11-18-2009, 10:07 AM
Join Date: Oct 2007
Location: Leander Texas
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play with the choke and you can tell if it is lean or rich. you may have a issue with high speed jet. simple to remove and clean the carb out
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11-17-2009, 07:14 PM
