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2001 carberated is backfiring

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Old Aug 5, 2010 | 11:03 AM
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Default 2001 carberated is backfiring
Hello o have a 01 fxsts carberated and as of this spring it started to backfire through pipes. Its a stock bike. I ride it pretty damn hard.it also starts hard or floods when its hot and I try and restart it. What could've gone wrong? I don't think I would have to adjust carb seeing as it ran perfect before I put it away before winter last year. Thanks for any help I can get.
 
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Old Aug 5, 2010 | 12:04 PM
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Does the backfire occur at low RPM or at top end?

As a general rule of thumb, low RPM backfiring is usually an ignition (points) problem....top end backfiring is usually fuel related....
 
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Old Aug 5, 2010 | 12:13 PM
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Default oops forgot to say.
Its happens when I get off the throttle. Mostly at low rpms but it does happen at high somtines.thanks
 
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Old Aug 5, 2010 | 01:28 PM
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Exhaust gaskets shot and or pipes loose
 
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Old Aug 5, 2010 | 08:19 PM
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Mine had the same problem. Mine was a tear in the rubber diaphram. Just take the top hat off the top of the carb and see if yours is torn.
 
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Old Aug 6, 2010 | 10:36 AM
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Default thanks everybody
I will be working on it all weekend until I get it right at least. Am replacing intake and exhaust gaskets,cleaning carbon,new spark plugs.will also check diaphragm and a few other things that need doing before my trip next week. Will post what fixed problem. Thanks again.

Ride hard!
 
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Old Aug 6, 2010 | 12:37 PM
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If your diaphram is torn your carb will not do anything,give it gas and it will die.
 
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Old Aug 6, 2010 | 09:28 PM
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Sounds like it's too rich
 
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Old Aug 7, 2010 | 08:48 PM
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My guess would be intake manifold seals. Good luck finding your problem, asd let us know what you found. Thanks, TJ
 
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Old Aug 8, 2010 | 03:32 AM
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Default not yet
Well my Map sensor was cracked wide open I found out when I took everything apart.Put new intake and exhaust seals in,cleaned carb.Tomorrow just gotta put tank back hook everything up. We'll see if all that helped Was out late Friday so didn't get that early of a start.
 
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