Well, the job from hell is done.  After the new three groove pulley was
already in, I found out that the rear engine tin for the original single
groove pulley is different from that of the triple groove pulley (the
single pulley tin lacks the indentation to clear the extra wide triple
groove pulley).  Luckily, pack-ratting paid off and I had kept the engine
tin from when I did my engine replacement last year.  Out with the new tin,
in with the old!  Not an easy job at that, but it is complete. So, if
anyone with the single groove pulley has to upgrade to a three groove
pulley, please be aware that you will either need the rear tin from the
triple groove variety or modify your existing tin.  BTW, the strange
vibration I haven't able to find has been attributed to the bent pulley.

Scott
'84 Westy
Rockville, MD