Hoi
My crankshaft bearing melted after a high(top) speed run, chasing a sport car.
When I returned to normal highway speeds I pulled the clutch (Not shure if it was for sound/ check for topgear)
Oil was 15W40 turbo diesel oil (cheap and no friction additives)
Front bearing (very thin)  
https://goo.gl/photos/btF7pdQHYREX73ZJ7
Rear
https://goo.gl/photos/VeKQbpPJ6DRuuTFq5
Crankshaft
https://goo.gl/photos/49rC7qSRtQwDD1vE6
Hopefully this will polish out.
Is the crankshaft heat treated from the factory? There is bleu discoloration

Things I need (engine 5A8 tr1 1983)
Rods, Pins and bearings (can I find them at the dealer?)
Piston rings( there a 3 sources on ebay  America, Japan and Germany which one?)
Cilinder head gaskets
Other gaskets
An upgraded oil pump (xv1100?  Is the bt1100 an option/better?)

The cilinder also needs a hone (and hopefully no oversize pistons)

Bearings and Rods of the  1100 Virago  should fit, XVS 1100 or BT1100 are different (at least the Rods), the Oil -Pump of the BT works.
If you can´t get spares at CMS or so try "Yamaha Klassiker Parts/ Horst Meise ".
Why do you need new Rods?
Regards Ali

Back on the road  
new oil pump, connection rods, other crank, bearings, piston pins rings,  rocker arms and pins.
https://www.youtube.com/watch?v=taQtWujtG4Q

No, Mac exhaust with a hand made cone exhaust (somewhere in italie).
It was to expensive to import the cone from America.