Dakota Digital STM-100 for Harley-Davidson Speedometer Tachometer Interface
The Dakota Digital STM-100 converts the Harley-Davidson ECU databus signal into traditional analog-style speed and tach outputs, making it possible to run nearly any aftermarket speedometer or tachometer on 2004-2013 Harley-Davidson models while also providing built-in diagnostic code reading and clearing capability.
Key Features
- Interfaces Dakota Digital and most aftermarket speedometers and tachometers with 2004-up Harley-Davidson ECU databus
- Outputs: accessory power, ground, tachometer signal (1, 2, or 4 cylinder adjustable), speedometer signal (8,000 PPM), Check Engine signal
- Built-in digital readout for reading and clearing Harley-Davidson diagnostic trouble codes
- Includes all required harnesses and hardware
Technical Specifications
- Compatible Bikes: 2004-up Harley-Davidson (excluding 2011+ Softail, 2012+ Dyna, 2014+ Road King)
- Speed Output: 8,000 PPM
- Tach Output: Adjustable for 1, 2, or 4 cylinder
- Additional Outputs: Accessory power, ground, Check Engine signal
- DTC Capability: Read and clear Harley-Davidson diagnostic trouble codes
Fitment Notes
- Not compatible with 2011 and newer Softail models, 2012 and newer Dyna models, or 2014 and newer Road King
- The STM-100 outputs an 8,000 PPM speed signal – verify your aftermarket speedometer is user-adjustable before ordering
- Review the fitment tab for the complete compatibility list by model year






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