MasterTune-HD is a Windows-based ECM reprogramming tool specifically for use with 2001 and later Delphi-equipped Harley-Davidson® motorcycles that utilize the diagnostic interface. MasterTune-HD also supports 2005 and later Retrofit ECM Service Modules when installed on earlier vehicles.

MasterTune-HD includes the following key features:

• Save and restore the original factory calibration
  
• Optional multi-vehicle interface
• Allows changing of factory speedometer calibration
  
• Preset limits to prevent adjusting values beyond reasonable settings
  
• Stores original and the last table saved edits so tuner can return to previous configuration
  
• Comparison functions quickly identify changed regions in tables
  
• Adjustment of front and rear cylinder spark advance
  
• Adjustment of front and rear cylinder volumetric efficiency
  
• Allows changing factory RPM limit
  
• Adjust for different fuel injector flow rates
  
• 2-D and 3-D graphing of tables to help visualize tuning maps
  
• Ability to print table graphs and table values

Note that MasterTune-HD can be licensed for programming use on either single or dual vehicles and the interface will ‘lock’ to the vehicle the first time it is used for programming.