Question about 2006 Harley Davidson XL 1200 C Sportster Custom

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I have an 06 XL 1200 that just started choking out

Bike runs fine cold using choke but 10 minutes into ride it starts to sputter and gets progressively worse especially from a stop

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This could be a variety of issue's from over choking, to bad fuel. Make sure your not leaving the choke on to long, as this can foul the plugs. Bad fuel could cause this, as water or other contaminents get into the float bowl and don't affect the enrichment ports due to fuel bypassing the float bowl. This would lead to the bike running worse as the enrichment knob is pushed back in. Last but not lease, could also be an electrical related issue due to the bike warming up and causing a short or open as stuff expands. I would change your plugs, then drain the float bowl into a clear glass jar to examine contents. if fuel and spark seems ok, you will have to look at electrical. plug wires, crank shaft position sensor, coil. It may take someone with the tools to test these components in order to diagnose the issue. If you see that the tach (if you have one) or lights in your display's flicker, it could also be battery related. loose ground. Many possibilities.

Posted on Aug 18, 2009

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Sep 25, 2012 | 2003 Harley Davidson XL 1200 C Sportster...

1 Answer

Harley wont start with choke on,but can start it with choke off


Hi Cully, if you have a carburator the usual suspects are:
1. Damaged or restricted fuel tank venting system (gas cap).
2. Inlet system air leak.
3. Vacuum piston malfunction.
4. Accelerator pump leaking or no output.
5. Plugged bowl vent.
6. Fuel level (float chamber) too low.
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Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

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1 Answer

While riding bike started to sputter and turned off. sounds like it was not getting gas. Starts fine when choked but eventually sounds like it is starving for fuel, sputters and then turns off


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May 04, 2011 | 2004 Harley Davidson XL 1200 C 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.

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What do you mean by holding the choke for a minute? what is unusual about that?

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Sounds like your flooding it out with the choke out. Try the next time you go to start the bike when it's cold with the choke out and when it starts push the choke all the way in and keep it running with the throtle. If it runs better after doing this then your flooding it on start up. Use 1/2 choke to start cold and see what it does. Good Luck

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It depends on the tempature, if its pretty chilly out yeah. Try easing the choke in slowly, and when it will idle at about half choke go aheand and take off but run the bike easy for a few minutes then close the choke.

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