This is good info. I have to change the rubber seal, # 11 in the pic above, on a friend's r1200gsa.
Whenever I have to do such a job, I tighten the adjustable pin to whatever is needed (8Nm in case you use bearings, handfeel for bushings
), then mark the pin using a black marker and then tighten the locknut to the needed torque. Then I check the pin for movement. It never moves, the mark is in the same position, every time :)