Question about 2000 Harley Davidson FLSTC Heritage Softail Classic
If this is a new installation, your carb may not be jetted correctly or if the carb has been running for a while, you may have a vacuum leak somewhere. Your carb should be jetted 29.5-31 on the slow jet and 72-74 on the main with your 88" engine. If you've modified the exhaust, the jetting could varry a bit from that.
If your carb has been running for a while with no problems and you haven't changed anything and it's suddenly started running lean, I'd remove the carb and go through it. Check all the jets to make sure they aren't partially blocked. Check or replace the intake manifold gaskets where they join the heads. The carb has a vacuum takeoff point as well. It should have a hose supplying vacuum to your VOES and the vacuum operated petcock unless these items have been removed or replaced. Make sure that hose is in good condition.
Also, when you pull into a gas station, look on the pump and see what percentage of ethanol has been added to the fuel. Although I haven't seen it and cannot verify it, I've heard talk of some stations selling fuel that has more than 10% ethanol blended in with the gasoline. Since ethanol is basically alcohol, it will run leaner than gasoline with the same jets.
Posted on Nov 06, 2010
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Posted on Jan 02, 2017
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