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www.voigt-mt.de

VOIGT MOTO TECHNIK

Assembly instructions

for extension adapter for hydraulic BMW clutch hoses

Rev: 26860_20.91

26860

This brake adapter is specially designed for use on the following 

vehicles to extend the clutch hose:

K21 (R nineT) (01/2013 - 08/2016)

K50 (R 1200 GS) (10/2011 - 12/2018 only LC)

K50 (R 1250 GS) (2018 - until today)

K51 (R 1200 GS Adventure) (09/2012 - 2019 / only LC)

K51 (R 1250 GS Adventure) (2018 - to date)

K52 (R 1200 RT) (01/2013 - 12/2018)

K52 (R 1250 RT) (2018 - to date)

K53 (R 1200 R) (11/2013 - 12/2018)

K53 (R 1250 R) (2018 - to date)

K54 (R 1200 RS) (06/2014 - 12/2018)

K54 (R 1250 RS) (2018- to date)

K71 (F800S) (12/2004 - 07/2012)

K71 (F800ST) (12/2004 - 07/2012)

K71 (F800GT) (12/2004 - 07/2012)

These assembly instructions have been compiled to the best of our 

knowledge, but are not guaranteed. If you should not be able to cope 

with the installation or have any doubts, please contact the support 

or a specialist workshop. Please note that we are not liable for dama-

ge caused by improper installation.

Note:

• 

Please use only suitable tools

• 

Make sure that the motorcycle is held securely during the work

• 

Carry out the installation in clean, non-dusty areas

• 

An additional helper facilitates the assembly work

Thank you for choosing a quality product from Voigt MT GmbH.

Note:

We expressly point out that brake parts are safety-relevant vehicle parts. For this reason, necessary work may only be carried out by suitably quali-

fied persons. Read these assembly instructions at your leisure until the end before starting work. These assembly instructions are only intended as 

a guideline and have not been prepared for a specific motorcycle type. For vehicle-specific instructions, bleeding instructions, refer to the vehicle 

manufacturer‘s workshop manual or ask your dealer.

Disassembly:

Adjust the brake cylinder (master cylinder) on the handlebars so that the fluid reservoir is horizontal. Then loosen the brake hose fastening screw 

and pull it out carefully. 

CAUTION: 

Here, some fluid will leak out. Please collect it so that no components of the vehicle come into contact with it. This can cause damage 

to the paintwork!

CAUTION: 

As long as the system is open, the brake lever must not be operated! Should this happen, the brake system must be bled again. Plea-

se visit a specialist workshop. 

Assembly:

Mount the adapter to the brake cylinder using the enclosed banjo bolt and the copper sealing rings (tightening torque according to vehicle 

manual!). The milled cut-outs on the rear of the adapter match the anti-rotation device of the brake cylinder. Then the brake hose is screwed into 

the adapter with the BMW banjo bolt using the copper sealing rings (21-23Nm). 

Note:

 Please do not loosen the small built-in Torx screw. This is 

self-adhesive and only available for production reasons. 

Normally, no bleeding of the hydraulic system is necessary. Put the brake cylinder back into normal position and operate the lever several times 

(min. 3 minutes). If the brake pressure has not been established, apply pressure to the lever overnight (fix lever for example with a cable tie). The 

system will then function normally again. In some cases, it may be necessary to bled the system.

Inspection:

Check the minimum fluid level on the window of the fluid reservoir tank and top up according to the vehicle manual if necessary. Remove any 

remaining liquid on the outside of the parts and check the tightness of the connections. A brake test must be carried out at walking speed before 

the first ride.

The work is now complete! However, a regular check of the product and the tightness of the components must be ensured. If a component 

shows signs of damage, it must be replaced immediately.

The Voigt MT GmbH Team

Delivery contents:

1x adapter for brake, black anodized 

(VMT M10X1 B FF & date of manufacture)

1x banjo bolt M10x1.0 V2A Torx (length 18,5mm without head) 

4x copper sealing ring (10x14x1.0)

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