I am slow, and do appreciate the help Bob. The bike is a Honda CX500C, 1982. Voltage between the solenoid large terminals ignition on is 11.9. No change when starter button is pushed. Voltage from the hot (red) terminal of solenoid is 11.9. My voltmeter red probe goes to that terminal. My black probe goes to the starter mounting bolt .There is no "solenoid ground to starter". Current flows from through the positive battery cable from the battery to the B stud on the solenoid, through the solenoid's contacts (when the solenoid is actuated) and from the solenoid's M stud through the starter cable to the starter motor, which is connected to ground through its mounting points. Depending on which model you have (you still haven't told us) the battery negative cable (sometimes referred to as the ground cable) is connected to either a stud on the frame or is sandwiched between the starter motor and its bracket to complete the circuit back to the battery.
"The voltage to the solenoid is 11.4 when starter button is pushed" is meaningless if you don't tell us which of the 6 terminals on the solenoid you measured the voltage at.
There are several reasons why a solenoid that is functional might not click when you press the Start button. Start by measuring the voltage between the A terminals while you press Start.
The diode is connected between the neutral light circuit and the starter solenoid circuit so that the neutral switch bypasses the starter disconnect switch but the starter disconnect switch has no effect on the neutral light.
- If the diode is missing or has failed in open circuit mode the starter will only operate when the clutch lever is pulled.
- If the diode has failed in short circuit mode the neutral light will come on whenever you pull the clutch lever.