I recently picked up a 2004 R1150RT for next to nothing from a buddy. I’ll admit this is my first BMW. The bike has 37500 miles on it and is in good shape overall, though it sat for about four years prior to the day I hauled it home. Went through fuel system, brakes, performed the 36k mile service and have about 150 miles on the bike so far. I’m pretty concerned about the amount of rear wheel play evident when the bike is in gear on the center stand. The best way to illustrate this is a video using the brake rotor holes as a movement reference. My source of worry: Symptoms: A definite clunk when starting from a stop in first gear or getting on the throttle after coasting. The play is very obvious when loading and unloading the driveline. That said, I feel no concerning vibrations at any speed up to 85mph. I peeled back the final drive to swing arm boot and found what has to be a u-joint grease seal in the swingarm tube (see attached photo). Is there any other source for the seal shown in my attached photo? Alright BMW guys, share some oil head wisdom with me here. For reference, I’ve got a 60k mile Super Tenere with a fraction of this much driveline play! I was all geared up to pull the final drive and swingarm, but figured it might be wise to ask here before I get too deep into things. Thanks for the help! Unrelated to my driveline play concerns, the pinion shaft seal is leaking a decent amount on my final drive. Is seal replacement alone (locknut removal and all that) something that can be done without any other final drive work?