Question about 2004 Harley Davidson FXD - FXDI Dyna Super Glide
It sounds like the carb is jetted too lean. They come from the factory jetted as lean as possible in order to meet EPA emission regulations. I'd start by changing the slow speed jet. You need to go up ONE size of your slow speed jet. If your bike has a #48 slow speed jet in it, you need to go to the next larger jet, a #50. I'd also drill out the "anti-tamper plug" that covers the idle mixture screw so that I could adjust the idle mixture. You must be careful when you do this so you don't damage the brass idle screw that is hidden under the plug. Drill a small hole in the plug. Drill just enough deep enough to go through the plug. Thread a screw into the plug and pull the plug out exposing the idle mixture screw. When you get the engine started, adjust the screw to the highest, smoothest idle speed. You can also richen up the mid-range slightly by taking the top off the carb and removing the slide. Take the needle retainer out and remove the needle from the slide. Put a three millimeter flat washer that is about 0.020" thick on the needle from the long end. Use a small dab of grease to hold the washer on while you drop the needle back into the slide. This raises the needle by twenty thousandths enrichening the mid-range mixture just slightly. Replace the needle holder and reinstall the slide into the carb. Insert the spring, position the diaphragm and reinstall the top. Make sure you don't pinch the diaphragm. If you don't feel comfortable doing this work, find someone that can do it for you.
Posted on May 26, 2011
1st id try sea foam in the tank give it time to work . could be bad gas is it carb drop bowl check slow jet & main jet for obstruction... Id pose this ? on harleytalking.com they have helped me ... good luck..
Posted on May 26, 2011
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Posted on Jan 02, 2017
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