Bevel drive

[Jordan]

Wow, I've owned 6 Ducati singles and worked on all of them, and never came across this problem.
I think something suspicious has happened - maybe a too-tight collar over the semi-cylindrical coupling halves was forced on?
Maybe try a hot air gun.

[lscart]

Well as said, a few taps, WD40 and two wedges it has come off, thanks for the input everyone

[Jordan]

Very good.
Did you first try to remove the head with the bevel tube attached to it?

[lscart]

No, I removed the two cap heads. Is best to keep them in then?

[Duccout]

Yes! Normally to remove the head it is best to leave the bevel shaft attached to the head and just wiggle the whole head free.