did my lubrication of the drive shaft on my 2012 r 1200 rt I was able to do both ends of the drive shaft without removing the swing arm. Getting the drive shaft to engage on the engine end took some moving of the drive shaft to get the right angle and then to knock the drive shaft enough to engage the snap ring was a bit tricky but changing the angle of the shaft and keeping at it did the job. I lubed the splines with lube I was able to buy a baggy with enough lube to do the job from my dealer in Iowa city without buying a large amount that I wouldn't need but once. Looking at the splines there was no rust and looked fine. Another tricky part was getting the engine end rubber boot on as it was kind of tight in the room allowed but it's a covered area and I expect it's on good enough though it wasn't a solid engagement of the boot to the casing.