Top end and all gears etc. now stripped off the cases.
Big thanks to Dr.Ray for the use of a primary gear puller.
Rally and Max are bang on the money, the vertical cylinder big end bearing has gone.
http://www.thelasturl.net/M1000/V_Rod.MOV
The resulting wobble has caused the vertical gudgeon pin to eat a chunk of piston. I was planning on new pistons anyway...
Split the cases
...and the full horror is visible
The remains of the big end shell, squeezed between the rod and crank web
Plenty more bits of bearing shell in the case
Off to Rosso Corse, where I can strip the heads, using Ray's slide hammer.
The vertical exhaust valve looks as though it's just kissed the piston. One of the collets has broken and the valve guide oil seal is destroyed, it just fell out of the head.
At least the cams and rockers all look okay. Not that I'll be using these cams.
Thanks again to Ray at Rosso Corse for the use of the special tools I don't have and the ready advice when I reach the edges of my knowledge.