Output Shaft (Countershaft) Speed Sensor Replacement

Do the battery removal procedure (see BATTERY REMOVAL AND INSTALLATION )
Disconnect the output shaft (countershaft) speed sensor connector, and remove the output shaft (countershaft) speed sensor (A)

Fig 1: Output Shaft (Countershaft) Speed Sensor And O-Ring With Torque Specification
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install a new O-ring (B) on a new output shaft (countershaft) speed sensor, then install the output shaft (countershaft) speed sensor and the sensor washer
Check the connector for rust, dirt, or oil, then connect the connector securely
Do the battery installation procedure (see BATTERY REMOVAL AND INSTALLATION )