This is my first BMW k1200LT. I work for an auto dealership and this was traded in and before anyone knew we had it I laid claims to it. I did not even test drive before buying it I just started it up drove it in the parking lot and said it was mine. Now to my issues. I have a noise that starts in when above 3500 to 4000 rpms that I would say sounds like a bearing knock. I thought it went away when at highway speeds but I was wrong because as I was driving through some construction they had cement barriers on both sides and I could then hear it at highway speed. It is more prominent on accelerating than decelerating but it is still there on both. If I am coming to a stop and downshift it is there from 2500 rpms or higher. I can sit still and rev the engine and when I get to just over 3500 rpms the noise is there. The noise is a rapping or knocking noise. If it were a car I would say the bearings are bad but the bike idles perfect and performs very smooth so I don’t think it is bearings. My nest issue is I think there is something loose somewhere in the rear end. I have had it on the stand tried moving things around but found no play in anything unless there is some other way I have to check for this. What is does is when I am coming up to a curve in the road and I lean to the right or left it seems like something moves to throw me off balance just a little. Now if I make the same right or left turn I have no problems but if I curve to the other side then it is like it pivots to that side. I tried moving the tire and swing arm but nothing seams loose.