With an allen key or T10 torx (normally supplied in your tool kit) inserted in the a hole on the side you can easily remove the filler cap. With either of these tools you turn the Oil Filler Plug 120° around.
Supplied with the BMW logo.
Fits: R1250GS/ADV, R1250RT, R1250R, R1250RS, R1200GS/ADV WC, R1200GS, R1200GS Adventure, R1200R, R1200RT, R1200S, R1200ST.
Hornig R1250 Series|R1200 Hexhead|OC|Boxer Water-Cooled Oil Filler Cap w/BMW Roundel Logo
Produced by Hornig of Germany