Front Fork Bridge Ball Joint on Telelever suspension.
Simply replace the boot rather than the entire Ball Joint if the joint is still functional - see Part No:BallJointBoot409
Vehicle Manufacturer: BMW
Application: BMW K Bike, Oilhead, Scooter Models
Make/Model: BMW C1, C1 200, K1200, R850, R1100, R1150, R1200
Model Years: 1992 - 2006
Manufacturer #: 31 42 2 311
409