World’s First Personal Diagnostic Tool for Harley-Davidson Motorcycles

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Harley-Davidsons are known for their reliable engines, but as we all know, sometimes you’re just plain unlucky. A company called Smart Vehicle Diagnostics LLC, created the first personal diagnostic tool for Harleys, called Motorscan.

The tiny plug and play adapters work on the majority of Harley-Davidson motorcycles manufactured from 2001 to 2015. Future software updates will extend the compatibility to newer models. There is a free smartphone app that you install on your Android or iPhone that interfaces with the adapter to read any fault codes for your motorcycle.

The Motorscan adapter plugs into a motorcycle’s diagnostic port and can be left there indefinitely. Using the Motorscan app, a bike owner can read fault codes and conditions with detailed descriptions, clear the check engine light, access various bike systems, from the electronic control unit (ECU) to the dashboard, to see data parameters, view virtual gauges, and more. Bike owners can easily save diagnostic reports and email them to their mechanics with a touch of a button.

There are two types of adapters available. The MSDKHD4 4-pin adapter is compatible with older models with Delphi engine control units and 4-pin J1850 OBD connectors. The MSDKHD6 6-pin adapter works with most of the newer CAN-Bus Harley-Davidson bikes with 6-pin OBD connectors. You can check a motorcycle’s compatibility, as well as purchase the unit, over at

About the author

Buks has had a passion for two-wheels since childhood. After his first motorcycle, a fire-breathing two-stroke Yamaha TZR250, he realized he was hooked. When Buks isn't writing for UltimateVelocity he enjoys practicing martial arts, gardening and spending time with his family.