Solenoid The Problem
With some advice help I was able to get the solenoid off the bike today. Had to remove rear exhaust pipe; move oil tank; remove battery tray to get to the solenoid. Was told 3/8 wrench would fit the mounting screws but I found mine had allen head screws. Pulled solenoid off and retrieved the spring and put the unit in my vice. Taking the cap off I could see that the brass/bronze studs and contact area inside were worn pretty bad, and the flat plates gone from one and almost gone from the other. There is a plunger that activates against these two brass/bronze studs to connect circuit to pass current through to the starter. The studs were also almost worn to the housing cover. The plunger inside is rough to the touch and galled.
So I think it is pretty safe to say that the solenoid is shot and is the problem and not the starter itself. That's good news as the solenoid should be plenty cheaper than a $300 starter.