Question about 2005 Harley Davidson XL 883L Sportster

1 Answer

Sportster Missfiring When my bike warms, ridden for about twenty minutes, it will begin to missfire off idle, and I have to blip the throttle to get it up. But it will take off under full throttle, running just fine. It happens as I reduce speed, come down to slower speeds, and then it begins this little missfire issue. Very weird, but just do not know where to start. IT feels more like an ignition issue than carb/gas, but whe knows???

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 8 Answers

Sounds like a carby jetting issue. Sounds like she's running lean above idle, after you zero the enrichener. Suggest adjusting the pilot air screw ( air mixture screw) under carby. You need to remove a blanking cap to do this. See eg Buzz Buzzelli's book for this, or a Sportster forum. I'd back it out to 3-3.5 turns, very gently by 1/4 turns till she runs well. Good Luck.

Posted on May 21, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have cbr600 87 and it idles great but when throttling hard its like missfiring then eventually revs up its had new airfilter installed


First check if same with filter off, may be too dense. replace plugs. has it ever overheated?, could be throttle sensor or o2 sensor if has one

Aug 03, 2014 | Cars & Trucks

1 Answer

Sportster bogs off idle


Hi Anonymous, give the nice folks at dynojet a call. Have nice day.

Feb 08, 2012 | Harley Davidson XL 1200 C Sportster Custom...

1 Answer

Recently purchased a sportster 1200 xl low rider 06 plate. Which is great in every way apart from town use, I find that once the engine has got warm I am having to continually blip the throttle to stop it...


Regrettably, it is a "norm" for an H-D Sportster but it's fixable. The engine is jetted very lean in order to meet EPA emission standards. The lean mixture is what causes the spitting back through the carburetor and poor idle qualities of the engine. You can improve the low speed and idling characteristics of your engine by going up one size on the low speed jet and readjusting the idle mixture. If you can do this work yourself, let me know and I'll give you the instructions on how to do it. If not, take your bike to a performance oriented shop and talk to them about it. If they have a dynometer and an exhaust gas analyzer, they can fine tune your bike to where it runs like it should.

Good Luck & Ride Safe
Steve

Sep 10, 2011 | 2006 Harley Davidson XL 1200L Sportster...

1 Answer

I have a 2005 harley davidson sportster xl 1200 custom. after bike is at normal operating temp.when i stop for redlight or stop sign, bike idles to fast.i can let out on clutch little bit and it will slow...


If the carb is adjusted correctly, the engine will not idle without the choke when cold. I will usually take at least 3 to 5 miles of riding to get the engine warm enough to idle by itself without the choke. If your bike is a full operating temperature, it should idle at about 1000 RPM. If it's idling higher than this, you need to slow it down a bit.

Remove the air filter cover and look at the top right side of the carb. You'll see a screw there . This is the throttle stop screw. Turn the screw counterclockwise to lower the idle speed to 1000 RPM or so. Blip the throttle and let it settle back to idle. Reset it if necessary. Once set, put the air cleaner cover hand on.

Mar 14, 2011 | 2005 Harley Davidson XL 1200 C Sportster...

1 Answer

Intermittent problem. Truck ran fine one day and barely ran the next time I started it. Runs incredibly rough like it's missing but not like a consistently missfiring plug but missfiring on all plugs...


Check for sticking idle air control valve and stuck open EGR valve. Both are common causes for very rough engine operation due to fuel-air ratio being too far off. Also check for large vacuum leak such as from rubber hoses connecting PCV valve to intake. Feel around for squishy or oily rubber which would indicate a leaking hole in the rubber hoses.

Sep 28, 2010 | 1991 Ford Ranger Supercab

2 Answers

Head gasket


depends where its blown if your oil is milky looking and thick or it blows out all of your coolant if you have rad cap of ff you will see bubbles in rad either will indicate a bad gasket

Apr 20, 2010 | 1992 Cadillac DeVille

2 Answers

Idle control and throttle position sensor


It could be both. You can test both with an ohmmeter. Missfire is usually do to faulty plug wire or bad plug. If not idling correct, then the idle control valve or 02 sensor is faulty. If missfiring or popping during acceleration would indicate faulty throttle position sensor.

Sep 30, 2009 | 2001 Hyundai Elantra

1 Answer

'07 Triumph Bonneville idles but wont accelerate


What happens when you try to accelerate?

Does the exhaust smell 'weird' when it's idling?

The most likely problem, especially with the bike sitting up during summer, would be gas has gone stale. If the bike sits long enough, the gas will actually turn into a varnish.

Drain the tank, refill with fresh gas, and let it run a while.
Basically, you have to run out whatever gas is between the tank and the cylinders, so the fresh gas can get to the cylinders.

I'd put a box fan blowing on the front of the bike to help keep the ehat down. Blip the throttle after a few inutes. Depending onhow much old gas is 'stored' in the fuel lines and such, it may take 10 or 20 minutes to burn out the old gas. Keep blipping every few minutes, and let it cool down after 20 minutes. Some bikes have short fuel path and clear in 2 minutes at idle, I've seen custom setups that took over an hour.

Sep 27, 2009 | 2007 Triumph Bonneville T100

1 Answer

Missfiring, banging on over run,starts after about 10 minutes


Weak or failing ignition coil and/or module will cause this, as will a flooding carb.

Jun 09, 2009 | 2000 Harley Davidson XL 1200 C Sportster...

2 Answers

Harley runs nice in 40-50 deg. weather only


Hey Tom, gonna try and help ya here...typical vapor lock/overheating is what your describing and i sure hear a lot of it w/harleys...are you using a very high grade synthetic oil , like castrol Syntec Actevo ? are you filling up w/ premium gasoline ?
make sure your timing is not too far advanced and don;'t let it idle too low...when you come to a stoplight stand up for a strech while letting your engine get air not blocked by your legs....all these things will help greatly......Good luck to you friend...Tim

May 11, 2009 | 2005 Harley Davidson XL 1200 C Sportster...

Not finding what you are looking for?
2005 Harley Davidson XL 883L Sportster Logo

326 people viewed this question

Ask a Question

Usually answered in minutes!

Top Harley Davidson Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4514 Answers

Gills Lango

Level 2 Expert

195 Answers

Mike

Level 3 Expert

4336 Answers

Are you a Harley Davidson Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...