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4th August 2009
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Biker
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Join Date: Jul 2009
Posts: 13 Sportster/Buell Model: 1200 custom Sportster/Buell Year: 1997
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Burping sound in rear pipe?
My rear pipe has a hollow burping sound when idling. I dond notice it when riding but when I pull the clutch you can hear it and if you let the clutch out it tends to backfire. It seams to go away after I have been ridding for a while. Im new to this so I dont really know were to start. Any thoughts?
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4th August 2009
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The crazy one...
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Join Date: Mar 2006
Location: Heatville
Posts: 2,510 Sportster/Buell Model: rigid 88" highly modified Sportster/Buell Year: '03 Sportster/Buell Model #2: iforgot Sportster/Buell Year #2: 80's Other Motorcycle Model: crs Other Motorcycle Year: 80's
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Are you referring to an actual backfire out the pipe, an off-idle stumble, or carb pop?
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It is now "later" than it has ever been!
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4th August 2009
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Biker
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Join Date: Jul 2009
Posts: 13 Sportster/Buell Model: 1200 custom Sportster/Buell Year: 1997
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i'm thinking a carb pop.
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5th August 2009
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Biker
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Join Date: Jul 2009
Posts: 13 Sportster/Buell Model: 1200 custom Sportster/Buell Year: 1997
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as it idles it stutters and has an uneven exhaust pattern unlike the front pipe that is smooth.
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5th August 2009
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The crazy one...
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Join Date: Mar 2006
Location: Heatville
Posts: 2,510 Sportster/Buell Model: rigid 88" highly modified Sportster/Buell Year: '03 Sportster/Buell Model #2: iforgot Sportster/Buell Year #2: 80's Other Motorcycle Model: crs Other Motorcycle Year: 80's
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Is this something new?
When did it start?
What was the last thing that was changed or worked on?
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5th August 2009
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Biker
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Join Date: Jul 2009
Posts: 13 Sportster/Buell Model: 1200 custom Sportster/Buell Year: 1997
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started 3 days ago. after it started i changed the plugs and oil. nothing else done to it.
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7th August 2009
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The crazy one...
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Join Date: Mar 2006
Location: Heatville
Posts: 2,510 Sportster/Buell Model: rigid 88" highly modified Sportster/Buell Year: '03 Sportster/Buell Model #2: iforgot Sportster/Buell Year #2: 80's Other Motorcycle Model: crs Other Motorcycle Year: 80's
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Does it have good compression in both cylinders?
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7th August 2009
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Senior Chief Know It All 1st Class
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Join Date: Jan 2005
Location: Huntsville
Posts: 1,183 Sportster/Buell Model: XL1200 Standard Sportster/Buell Year: 2000
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MY 1200 Sportster, 2000 vintage, has never idled smoothly and if it did, something would be bad wrong.
Reb
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2000 Xl1200 V&H straightshots, SE aircleaner, highway pegs, deluxe seat, sissy bar, luggage racks, saddle bags, and QD windshield. Made to be comfortable while I haul ass. Black and chrome. Man is she pretty.
Back Home in Alabama - How sweet it is!
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7th August 2009
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Jester Mafia
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Join Date: Jan 2008
Location: So Cal
Posts: 8,531 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2006 Sportster/Buell Model #2: XL1200C Sportster/Buell Year #2: 2006 Other Motorcycle Model: 48 Other Motorcycle Year: 2012
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I think i know the noise and its fairly common
For lack of a better word it sounds like "PLOOP" its not a carb pop or exhaust backfire either
I have also heard the "Chirp" but only when the bike is cold
I cant tell you how i made them go away but they are.
The only thing i really do is torque the exhaust to 120 inch pounds using the screaming eagle gaskets.
Check the carb seals with propane
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Thy Sportster Come
It Shall Be Done
On Earth as it is on Salt
2006 Sportster XL1200C
Mikuni HSR 45
Jetted 30 slow,175 Main
97 Needle,Clip posistion 3
Hurricane Flow 3" offset AC,Rocketman Mod
Daytona Twin Tec TC88A,Rico Nomad Map
Sumax Thundervolt plug wires,NGK DCPR8EIX spark plugs. Gapped .040 and Indexed
Patriot Defender Pipe
Royal Purple 20W50 MC oil
Wix 57148 oil filter
Max Power, 77.73
Max Torque, 75.98
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9th August 2009
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Biker
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Join Date: Mar 2007
Location: western mass
Posts: 29 Sportster/Buell Model: xl1200c Sportster/Buell Year: 2006
Reputation: 66
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I hear the same sound when I back off the enrichener after start up, but only when the bike is cold. Kind of a bloop sound. Never worried me before now. Is this normal? Should I be concerned? Maybe I should bring it to the dealer. Thanks for contributing to my neurosis. Now I'll never get to sleep.
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Everything has been figured out, except how to live.
'06 XL1200C - Stage 1
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