[Darren69]

Originally Posted by utopia

Only trouble with that is that some (many) aftermarket filters have a different number of flats on the hex than the std Ducati ones have.
I laboriously hacked a homemade wrench out of 5/16 inch steel plate.
Imagine my annoyance when it didn't fit the aftermarket filter that I bought.
Easily solved by sticking to std or similar filters though.

I quite like the notion of using a jubilee clip to hammer on.
Filed for future reference.

That's annoying. You could always use a strap wrench as backup in that case maybe?