When you add an aftermarket air cleaner to your Harley-Davidson motorcycle, it can potentially affect the air-to-fuel ratio and the overall performance of the engine. In some cases, a tune or recalibration of the engine's electronic control module (ECM) may be necessary to optimize performance and maintain proper fueling.
Adding an aftermarket air cleaner can increase the airflow to the engine, altering the balance between air and fuel that the stock ECM has been programmed for. This can result in a leaner air-fuel mixture, potentially leading to issues like decreased power, rough idle, or even engine damage in extreme cases.
To ensure the best performance and longevity of your motorcycle, it is generally recommended to have your Harley-Davidson tuned or remapped by a professional after adding an aftermarket air cleaner. This process involves adjusting the fueling parameters and other engine settings to accommodate the increased airflow and maintain an optimal air-fuel ratio.
A skilled technician at a Harley-Davidson dealership or an experienced aftermarket tuner can help you with the tuning process. They will use specialized tools and software to modify the ECM's fuel mapping, ignition timing, and other relevant parameters, ensuring the motorcycle runs smoothly and efficiently with the new air cleaner installed.
Keep in mind that different aftermarket air cleaners and exhaust systems may require different tuning approaches, so it's crucial to consult with a knowledgeable professional who can provide tailored advice based on your specific setup and motorcycle model.