I've got a 2011 Ducati 848 EVO with 3400 miles, I bought it earlier this year with 1900 miles from a guy who bought it off his brother. Only took it on a track like 7 times he told me. He dropped it once but got everything fixed so it looks all good. Now I've noticed this since the day I picked it up, it had a wicked rattle at lower rpm's in first and second, sometimes 3rd but not in higher gears. I thought it was initially the wicked loose chain, that's why I bought it and didn't worry much about it. I tightened it, took away some noise but it was still horrible sounding. I looked into it further, lifted up the back tire and did a fresh chain strip with some kerosene and re-lubed it all up. That helped a bit but when I put it in gear on the stand it seems like every rotation the chain goes into a wicked jerk and makes like a jerking noise in the transmission. But not like a low RPM lug. But yet when you give it a few RPM's it goes away like something is loose in the transmission.... It is also not noticeable if you rev bomb it at like 5k> rpms when taking off, then you won't hear it. But i am like 95% sure it is coming from the transmission