Ducati 43mm non adjustable forks 1999 - 2005 ish - The ones with an awful lot of low speed damping.
There's some 43mm non adjustable forks fitted to the smaller engined Monster and SSie from 1999 to 2005 or so, made by Showa and Marzocchi and someone else who possibly makes them under license from Marzocchi (maybe?) that have quite amazing amounts of low speed damping. The easiest way to recognise them is to strip them and try to get the oil out of the cartridge. It would appear that the only way for the oil to get out is between the rod and corresponding opening in the top of the cartridge. A few drops at a time. I really don't understand that. As an aside here, after this style fork they went to an externally visually similar (I'd say probably identical) fork which has rebound damping only on one side and compression (allegedly) on the other. These are the forks in the S2R800, 695 and late 620 and 400 models. I don't see many of these bikes for fork oil change services, but I did an oil change on a 1999 750SSie a couple of years ago and tried going down to 5 ...