There is a drilling in the side of the plug in which you can put a size 3 Allen key or a Torx key T10 (usually found in the your BMW toolkit) in order to fit and remove it.
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Also referred to as oil filler cap.
This cover for the axle pivot for all new R1200, K1200 and...
Rear wheel centre cover with emblem. The holes in the...
The joint is the mount / adapter for the footrest...