How do i lean out carb on 2003 dyna - 2003 Harley Davidson FXD Dyna Super Glide

Running fuel/air too lean or maybe bad spark plug or wire. Just make sure wires are tight. Might be fouled.

First, try to avoid ethanol. It melts carb lines, and can goo up small passageways. Get some good gas and try again. Hi test if necessary. Check your specs, maybe the bike requires hi test.
Taking apart and cleaning involves soaking in fresh carb solvent to clean the small passageways. Is there an air cleaner? It may be clogged, test with it off.

air leak gasket intake manifold or carb to lean but probebly intake gasket usuly rear cilinder

either the idle jet in carb is clogged, and or it is running to lean

The pilot jet in your carb is stopped up causing no idle unless choke is on,clean the carb jets and your problem should go away,a clogged pilot/idle jet will cuase a lean condition,and when you use the choke it will draw just fuel and no air,hope that helps.

Your carb probably need going through. I would suspect that it's your accelerator pump has got a few holes in the diaphragm and maybe your slow jet is partially stopped up. If the bike has been sitting for an extended period of time, this is more likely the problem. The air mixture is not adjustable unless you or someone else has removed the "anti-tamper plug" that covers the idle mixture adjustment screw. And, only then if you or someone else has turned the screw. If the fuel air mixture has changed, it's something wrong inside the carb. I'd either take it apart and clean it or get someone else with the proper experience to do it for me.

Good Luck
Steve

You can adjust it IF your bike is equipped with a carb. You may have to take the outer air filter cover off. Look at the top of the carb. Just to right of the round looking top is the idle stop screw. Clockwise to speed it up.

Good Luck
Steve

If it'll whistle "Dixie", I'll buy it. (BG) No, if it's popping and whistling, it's probably got a vacuum leak somewhere. If it's a carbed engine, just look for an unplugged VOES vacuum line. It comes right off the backside of the carb. It might be time for a set of intake gaskets as well. If it's fuel injected, I can't help much there as I don't know a lot about those but if it's popping while idling, it's lean whether it's carbed or injected. If it's injected, you'll probably have to take it to a dealer.

Good Luck
Steve

Harleys are jetted lean from the factory for emissions purposes. If pulling the choke out slightly cures the problem, try a 45 or 48 slow speed jet. If you want to improve performance while the carb is off, try a Thunderslide or Yost kit for the carb. (Several other kits are available, but these are the most popular) They contain, jets, slide spring, drills and instructions. Well worth the money!

the carbs should have a half moon shaped thing where the cable pulls to open the carbs