OBD2 Motorcycle Diagnostic Plug Adapter. Item Type: OBD2 Diagnostic Cable. 1 x OBD2 Adapter cable. For KYMCO 3pin. 3 pin 4 pin 2in1 OBD2 Diagnostic Adapter Connector For Yamaha Motorcycle US. OBD2 Motorcycle Cable For Honda 6 Pin Plug Diagnostic Cable to 16 pin Adapter US.