Dakota Digital Aftermarket Speedometer/Tachometer Interface For Harley J1850 Motorcycles The Speedo/Tach interface by Dakota Digital enables you to connect their speedometers and tachometers with the databus signal from the stock Harley-Davidson Ecu. It works with most aftermarket gauges, except for some Softail and Dyna models. Enjoy seamless integration with your bike's ECU for accurate readings. Features: Allows simple installation of an aftermarket speedometer and/or tachometer Plugs directly into motorcycle's diagnostic port Connects to bike's data bus and outputs traditional analog signals Features outputs for speedometer signal (8000 ppm), tachometer signal (adjustable for 1-, 2- or 4-cylinder), check engine signal, accessory power and ground Digital readout works like a scan tool allows reading back and clearing diagnostic codes This device connects to the bikes data port and outputs traditional analog signals for a gauge of your choice. Outputs provided for accessory power and ground, tachometer signal, and speedometer signal. In addition to wired outputs, the Speedometer/Tachometer Module contains a digital readout which allows for both reading back and clearing diagnostic trouble codes, similar to a scan tool!