[sailor]

At what distance does the switch on the front brake close please. I mean how far do I have to push the front brake lever before the switch engages. It shuts me down after only 2 mm of travel of the lever. Is it a problem? Thank you

Many years ago, I posted a troubleshooting tutorial on YouTube. In doing this, I did many tests on various K1200RS and K1200LT.

TO ANSWER your question above: unlike the clutch side, the brake lever has only ONE micro switch. The same switch is used for brake light signal AND ALSO will disable the cruise.

In a quiet garage , with ignition OFF, you can listen to the internal "click" of this switch when you pull the brake lever slowly. It should engage when the tip end of the brake lever has moved about 4 to 5 mm. If you see only 2mm measured at the tip end, it might be too early , thus wind or vibration could cause a trigger.

If this switch engages too early (or too often) you may have notice other issues related to rear brake light. Have someone follow you and ask him to check if your brake light goes on while you are cruising at constant speed (or when you try to activate cruise).

From many owners on 4 separate K1200 forums, I would say the most common issues are related to EITHER: (1) clutch lever switch , (2) throttle rail switch , (3) rear brake pedal switch. The video tutorial tests are done in a static environment, SO this cannot reproduce othe electrical or vibration issues caused when riding.

 

[sailor]

Thanks for the great answer and advice 🙂 During diagnosis, I noticed that after releasing the foot brake, the throttle rotates a little and then returns to its original position. Gas displacement is approximately 2cm. It's alright? Thank you

The throttle grip movement / rotation is normal just after the rear brake pedal test. In the PDF file, at page 5, there is a note to explain this:
In Step 7: after you release the rear brake pedal, you should see (and hear) the throttle grip move by itself. This will confirm that the cruise-control unit can pull its own cable
leading to the throttle-bodies.


I assume you have have seen / read my PDF file that gives a summary of the cruise-control tutorial ?
The link to the PDF file is here and also in the YouTube description below video screen.

K1200RS - Cruise control troubleshooting tutorial

After having found many tips about the cruise control system of the K1200RS (here and on I-bmw.com), I taught that it would be useful to make a video tutorial to help other owners. Most video clips and pictures were done with a K1200RS, but 95% of the tips are also applicable to the K1200LT...

www.bmwlt.com