Note: This description applies for the brake filling and bleeding unit with extraction of the brake fluid by a partial vacuum at the brake caliper.
If other devices are used, comply with their manufacturers' instructions.
- Place the motorcycle on its centre stand so that it is level.
- Remove right fairing section skirt.
Cauton: Do not allow brake fluid to come into contact with painted parts of the motorcycle, because brake fluid attacks paint.
- Remove the top and bottom left-hand handlebar covers.
- Remove the combination switch and radio remote control.
- Place the handlebars in full right-hand lock.
![](https://motoinstruction.ru/img/bmw/21/127250.jpg)
- Loosen the clamping screw (1).
- Turn the brake fluid reservoir so that the sealing surface of the reservoir cap is horizontal when viewed from the side.
- Tighten the clamping screw.
- Remove the reservoir cap together with the diaphragm.
![](https://motoinstruction.ru/img/bmw/21/127251.jpg)
- Add brake fluid up to the MAX mark (arrow).
- Release the breather hose for the clutch fluid at the right-hand skirt bracket.
- Remove the protective hose from the filling adapter.
![](https://motoinstruction.ru/img/bmw/21/127252.jpg)
- Remove socket-head grub screw (arrow) from the filling adapter.
- Install bleed screw in filling adapter.
- Connect the brake bleeding device to the bleed screw.
- Open the bleed screw a half turn.
Caution: Do not permit brake fluid level to drop below the MIN mark during the bleeding process, otherwise air will be drawn into the clutch system. Bleed the system again if this happens.
- Draw off brake fluid until it emerges clear and free from air bubbles.
Caution: Dispose of old brake fluid in an environmentally friendly manner.
![](https://motoinstruction.ru/img/bmw/21/127253.jpg)
- Siphon brake fluid out to the MIN mark (arrow) in the reservoir.
- Assembly is the reverse of the disassembly procedure: pay particular attention to the following.
Warning: The motorcycle must not be ridden without the grub screw screwed into the filling adapter.
- Remove bleed screw. Immediately wipe off all traces of brake fluid.
- Install socket-head grub screw into the filling adapter and tighten.
- Pull the protective hose over the filling adapter.
- Secure the breather hose to the right skirt with a cable tie.
![](https://motoinstruction.ru/img/bmw/21/127254.jpg)
- Return the clutch-lever fitting to the marked position (arrow).
Note: Take care with the routing of the lines and cables when fitting the handlebar trim.
- Brake fluid grade — DOT 4
Tightening torque:
- Grub screw — 10 Nm
- Clamping screw — 5 Nm