Most likely the 59 club lots of history old school cafe racer stuff links with the Ace I think - google it
Its the frame size, Ducati do various sizes it just depends who made the frame and what mood he was in.
It might have been that the night before the guy making the frame was "on a promise" and didn't quite get to the "69" stage
Nice one Yes I am enjoying it, only been out for two short rides, still getting used to it Fancy putting fatbars on it, any idea if multistrada yokes will fit?