: A specialized Yamaha AI (Adapter Interface) unit. Newer models (like the 2020+ YZF-R1) often require a 6-pin OBD2 sub-lead harness (Part No. 90890-03266-00).
The older YDT versions cannot communicate with Yamaha’s latest or RCX380 controllers. The new download specifically includes updated firmware drivers and USB-to-Serial bridges for these modern units. yamaha ydt software download new