Hi SneakyMcC, Woody here.
Just managed to get online today after my house move.
My '94 900ss has just had the same prob, and just after I'd bought her and lastly, the very same bolt!!!!!!
I removed the engine, which presented no probs, just a little patience and time. Took it to Chris at Veloce Ducati in Norwich and I said take your time and got it back after 5 weeks and lots of Chris's sweat!!!!. All 7 Bolts presented no probs at all, Troublesome No 8 was a different storey.
A process called Spark Eroding was used in the end and today was my first ride out!. All went well till the end of my street and discovered I'd put the gear linkage on upside down (Schoolboy error I know
).
Just need to get the miles up now and iron out any teething probs. Best of look with yours.
Regards, Woody.