HARLEY DAVIDSON ENGINE TUNING
The tuning system focuses on Harley-Davidson engines equipped with DELPHI EFI (diagnostic communication J1850 or CAN)
The tuning system is based on diagnostic system MS531-HD. The MS531-HD is a professional diagnostic tool for Harley-Davidson Motorcycles; the basic tuning software will be included as a free option in the diagnostic software Version 12. To tune an individual motorcycle a TUNING DONGLE must be purchased that can be used for that specific motorcycle.
The tuning process does not require the installation of additional components or any motorcycle harness modifications. Tuning is based on the modification of EFI Calibrations (software modification) exclusively via the diagnostic connector.
The first step in Tuning is saving of the original EFI Calibration. The tuning operator can restore the original EFI Calibration at any time during tuning process (stock calibration).














