Check this by spraying aerosol carb cleaner at the intake manifold area when the bike is idling. The number one problem we see is an intake manifold leak at the cylinder head. The air cleaner and vent hose can cause a change in idle. Once you have made the adjustment, double check with the air cleaner re-installed. Check your shop manual if you are not sure. Make sure you are adjusting and checking the idle screw, not the high idle adjustment. To verify that your bike's idle is not on the high idle mechanism, attempt to insert a small piece of paper between the base of the idle screw and the bracket it pushes against. If the idle speed is wrong, remove the air cleaner cover and re-adjust. Make sure the bike idles at 1000 to 1050 rpm. If adding fuel on the green pot causes decreased performance, follow this procedure: This includes all FLHs, Road Kings, etc., up to 2001. The following information is strictly for the Magneti Marelli injection system. That means driving the bike for a good 15 minutes and then idling it for another 2 to 3 minutes before attempting any adjustment.Ģ.

In all of the recommended suggestions and settings given below, it is imperative that you are working on a FULLY warmed up engine. If DP base settings seem way off, you may want to have your mechanic look into the following:ġ.

When tuning a DP product on Harley Davidsons, you may come across mechanical and/or sensor issues that have preceded the installation of our product.

Magnetti marelli fuel injection problem