Converting a Harley Davidson 1340 Evo engine from a carburetor-fed system to electronic fuel injection (EFI) is possible, but it is not a straightforward or simple process. It involves several significant modifications and changes to the motorcycle's fuel system, electrical system, and engine management.
Here are some key considerations and steps involved in converting a carbureted Harley Davidson 1340 Evo engine to EFI:
EFI System Selection: Choose a suitable EFI system that is compatible with the engine and meets your requirements. There are various aftermarket EFI kits available specifically designed for Harley Davidson motorcycles.
Fuel Delivery System: Install a high-pressure fuel pump, fuel lines, and an EFI-compatible fuel filter to supply fuel to the injectors. Depending on the EFI kit chosen, additional modifications may be necessary, such as installing a new fuel tank with a built-in fuel pump.
Intake System Modifications: Modify or replace the existing intake manifold to accommodate the EFI throttle body or individual injectors. This may require modifications to the cylinder heads or intake ports.
Throttle Position Sensor (TPS): Install a TPS on the throttle body or intake system to provide input to the EFI system for throttle position detection.
Engine Management System: Install the EFI system's engine control unit (ECU) or electronic control module (ECM) and wire it into the motorcycle's electrical system. This involves connecting various sensors, such as the TPS, engine coolant temperature sensor, oxygen sensor (in some systems), and ignition system.
Tuning and Calibration: Once the physical installation is complete, the EFI system needs to be properly calibrated and tuned. This typically involves using software provided by the EFI kit manufacturer to adjust fuel and ignition parameters to optimize performance and ensure proper air-fuel mixture under various operating conditions.
Converting a carbureted Harley Davidson 1340 Evo engine to EFI requires advanced knowledge of motorcycle mechanics, electrical systems, and engine tuning. It often involves a significant amount of custom work and may require the assistance of a professional motorcycle technician or an experienced EFI conversion specialist.
It's important to thoroughly research and understand the specific requirements and compatibility of the EFI system you plan to install, as well as the potential implications for warranty, emissions compliance, and local regulations.