Caution: Do not allow brake fluid to come into contact with painted parts of the motorcycle, because brake fluid destroys paint.
- Drain the brake system.
- Remove right footrest plate.
![](https://motoinstruction.ru/img/bmw/21/127447.jpg)
Note: Mark installed position of brake hose (5) relative to brake master cylinder.
- Remove screws (6) and remove brake master cylinder.
- Open non-reusable hose clip (7) and disconnect return hose (4).
- Use an open-ended wrench to hold at the flats (arrow) and disconnect brake hose (5).
- Installation is the reverse of the removal procedure: pay particular attention to the following.
- Tighten new non-reusable hose clip (7) with pliers, BMW No. 13 1 500.
- Check and, if necessary, adjust play at piston rod.
Tightening torques:
- Master cylinder to footrest plate — 9 Nm (clean thread + Loctite 243)
- Brake hose to brake master cylinder — 18 Nm
- Footrest plate to frame — 21 Nm