Originally Posted by Big Bamboo
I know the twin shock BMWs require a bit of gear oil in the swingarm, but the Paralevers do not. Are their U-joints of a fundamentally different design, such that a Paralever is lubricated for life? Or is the oil there primarily to lubricate the splines where the shaft mates to the rear drive? (done with grease on the Paralever)
The u-joints are the same on pretty much all BMW's produced after 1970, minus the new new bikes. The oil in the early bikes did more for the splined end at the rear drive.