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3rd April 2012
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Biker
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Join Date: Sep 2010
Posts: 3
Reputation: 10
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Sportster 883 95 coughing need help
Hi everyone.
Here's my probleme. I have a 95 sportster with stock pipe and stock CV carb with the original jetting inside. The only change I've made last year was a retro air filter .When I ride it around 45 mph on the 3rd or 4th gear (give just a little bit of throttle), my carbs start to cough sometime. One shot or two times in a row. I have no probleme to start the bike.
I wonder what to check first? Intake gasket leak? Jetting? Air/fuel mixture screw? I need some advises. Thanks!
By the way sorry for my english....it's not perfect yet.  |
3rd April 2012
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XL FORUM TEAM MEMBER
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Join Date: May 2010
Posts: 216 Sportster/Buell Model: XL1200 Sportster/Buell Year: 1998 Other Motorcycle Model: Harley Davidson FLH Other Motorcycle Year: 1973
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Quote:
Originally Posted by marty_hart
Hi everyone.
Here's my probleme. I have a 95 sportster with stock pipe and stock CV carb with the original jetting inside. The only change I've made last year was a retro air filter .When I ride it around 45 mph on the 3rd or 4th gear (give just a little bit of throttle), my carbs start to cough sometime. One shot or two times in a row. I have no probleme to start the bike.
I wonder what to check first? Intake gasket leak? Jetting? Air/fuel mixture screw? I need some advises. Thanks!
By the way sorry for my english....it's not perfect yet. |
Welcome to the Forum! It sounds a bit like you may be going a little lean when accellerating at lower RPM. That condition is exactly why the CV carb uses an accellerator pump-- it gives a squirt of gas to richen the mix at this critical point. Naturally, the pumps wear out after years of flexing over and over again. Since you are basically running a stock motor (even considering your "retro" air cleaner), your stock jetting should be just fine. If it were me (and it has been) I would replace your accellerator pump-- its fairly cheap, easy to do, and makes a nice afternoon project. Even if its not the root cause, it certainly won't hurt anything on a 17 year old bike. However, I would be willing to bet that it solves your problem. Keep us informed.
Good Luck!
Joe
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3rd April 2012
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Jester Mafia
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Join Date: Jan 2008
Location: So Cal
Posts: 8,577 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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Welcome Marty !
I would replace the acc pump
But lets look at the idle mix too !
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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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3rd April 2012
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JESTER Mafia-Hooligan Div
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Join Date: Sep 2005
Location: West Central Indiana
Posts: 9,444 Sportster/Buell Model: 1200 R Sportster/Buell Year: 2005
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To THE FORUM Marty!
