For those following my previous post regarding an intermittent starter,
I was able to fix the problem.

What I ended up doing was removing the starter, taking the solinoid
apart and cleaning the solenoid. I also polished the solenoid plunger (I
could see some wear marks on it) then put a very light coat of
dielectric grease on it and reassembled it.  I also wire brushed the
starter terminals and lightly sanded them and also applied dielectric
grease on the terminals and reassembled the starter.

Since I've done this, the starter works perfectly.
I don't know how long this fix will work, but the price was right.

Todd
'88 Westy