Input Shaft (Mainshaft) Speed Sensor Replacement

Remove the air cleaner assembly (see AIR CLEANER REMOVAL/INSTALLATION ).
Disconnect the input shaft (mainshaft) speed sensor connector, and remove the input shaft (mainshaft) speed sensor (A).

Fig 1: Input Shaft Speed Sensor With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install a new O-ring (B) on a new input shaft (mainshaft) speed sensor, then install the input shaft (mainshaft) speed sensor, and washer (C) in the transmission housing.
Check the connector for rust, dirt, or oil, and clean or repair if necessary. Then connect the connector securely.
Install the air cleaner assembly (see AIR CLEANER REMOVAL/INSTALLATION ).