Blue Guy. Have you guys actually run an assay test on the oil and found that clutch friction material was an issue? Obviously any expended material from the discs or plates is going to end in the lubrication system but I'm wondering to what extent that debris is problematic. Also I'm wondering if there are differences in friction disc material between manufacturers that would be more problematic. Additionally, rider idiosyncrasies and frequency of service will effect the situation. Regardless, the dry clutch is the way to go. I may also toy with some sort of external filter system on a spare motor I have here. I posted some pics of plastic and metal gears. The plastic gears are I believe on the 899 or 959 motor. The metal gears on the larger bikes look the same to what Ducati has as their "Corse" pieces except that the Corse parts carry the "no you can't have this" DC numbers. Probably the same parts.
I'll have the oil and fuel tests back next week, and I'll see what they say. One of my riders was a bit brutal on the downshifting, which is where the STM or EVR clutch helps a lot, and I suspect that, plus lousy fuel (we have to run the circuits fuel, and it's some bioethanol slop they flog at outrageous price...) allowing poor combustion (piston crown glazed, but no pock-marks of detonation...) and the eventual contamination of the oil via the main oil gallery when the pressure relief valve opens (which is like, always...) ended the life of my motor. It's still possible that it was a duff con rod bearing shell, but ID'ing that is going to be impossible.
The 1199RS gears are superfinished, but look about the same weight as the standard steel gears. I was anticipating finding a snapped oil pump shaft, so I'm a bit gutted to have found, apart from the bearing which committed hari-kiri, an engine extremely well put together, and that bottom end is mighty.
On the older RS Desmoquattro and Testastretta we used to block off the oil bypass and run different high-flow filters, with regular oil changes, but the mechanical debris was negligible with a Nova or RS gearbox and some careful hand-finishing of rotating parts, plus, of course, the dry clutch.
I'll PM you the oil results. All my engines are going to get that strainer from now on, though. It looks like the sump is slightly deeper to accommodate the higher stacking of two micro filters (155 microns and 280 microns) and the modified pick up housing, and they run a .4mm alloy sump gasket, too.