Caution! Do not allow brake fluid to come into contact with painted parts of the motorcycle as brake fluid destroys paint.
Drain the brake system.
Disconnect brake line (1) and hose (2).
Release and remove pin (3).
Remove brake master cylinder (4).
Installation is the reverse of the removal procedure.
Tighten non-reusable hose clip (5) with pliers, BMW No. 131500.
Caution! Bleed the brake system carefully. Check/adjust piston rod play.
Tightening torque: Master cylinder to footrest assembly — 9 Nm
Checking and adjusting play of piston rod
Set the adjusting screw of the footbrake lever to distance A.
Distance A: 13.6 mm (0.536 in)
(Top edge of footbrake lever to top edge of adjusting screw).
Insert feeler gauge at right angles to direction of travel between the brake-light switch lever and the stop on the footrest plate (arrow).
Feeler gauge thickness: 0.2 mm (0.008 in)
Slacken locknut (1).
Turn piston rod (2) clockwise back into the fastener of the footrest plate to obtain play.
Carefully back off piston rod to take up play and tighten locknut.
Tighten locknut and recheck play.
Apply coloured sealing lacquer to the locknut.