New to me 05 950 Adv. 30k mi. I spent some time searching the forum for the same problem. Under aggressive acceleration when in rough conditions there is a sound which sound like the tranny is gonna rattle itself apart. Kind of like extreme cam chain noise that I've experienced on my klx. It seems like it may do it a tiny bit on the Tarmac but just barely if at all. It's exacerbated nailing it at lower rpms. Lugging it? ~3-4k rpms. It's clunky. The rattle even seemed to be present during rough descents where I was maybe working the rear brake to hard. This is the point where you tell me that most adventures do this. Seems more to the bottom. If I had to pick a side I'd say to the right. Everything seems tight. Skid plate swingarm wheel etc.