Question about 2004 Harley Davidson FLSTC - FLSTCI Heritage Softail Classic

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I just bought an 04 heritage that has a hypercharger on it and it has to warm up quite a bit before it will idle without the choke. you can smell that it is running very rich. what do i need to do?

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Odds are that you need to richen up your carb. You said that you can smell that the mixture is very rich. This is true if you're using the enricher. The enricher is designed to be very rich and it will foul plugs if you allow it to run too long. I usually run it only long enough to allow me to set the throttle lock and keep the bike running at a high idle without the enricher.

To actually remedy the problem and shorten the time you have to run the enricher, you probably need to enriched the low speed jet. The carb comes jetted very lean from the factory and usually does a lot of coughing and spitting out of the carb. If your slow speed jet is a #45, you need to go to either a #48 or a #50 slow jet.

Good luck
steve

Posted on Aug 23, 2010

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How to slow fast idle on carburated 88 vtwin 2000 harley davidson?


Mine does that too. If you lower the idle it will then be too slow when the engine is cool. You might be able to lower the idle just a bit but don\'t go too far. Slow idle is hard on the connecting rods. Look at the carburetor. where the cables come down to the carb there is a small screw that you can turn to make adjustments. I would only turn in COUNTER clockwise 1/2 turn to begin with. If it idles too slow when cool you could always pull the choke out a bit but that can be a nuisance. Try that to see if it helps.

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Hi, Anonymous and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
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it seems that the auto choke setting is maybe wrong or there is a problem with engine management, or a worn part which is sticking.

when cold, the engine should be higher as the choke will be on but a warm up idle of 1200 seem a bit high i would expect around 800 and then on restart if the engine is warm then the choke should be off but the idle being too low indicates one of the above.

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High idle at first start


quite normal as the vehicle has a auto matic choke,
once the engine starts warm up so the idle rate comes down "youdoit"

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