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.
See tools
Also referred to as oil filler cap.
This cover for the open hole beyond the swingarm pivot is...
Fold Away Lever Kit by Magura (clutch and brake lever)....
Handlebar risers with offset: 30mm higher and 21mm closer to...