Routing Front brake pipe '91 K75S

[Liverpool Brick]

Hi,
What could be easier than removing the front wheel to get the man to fit new rubber? Here's my tale....
Removed the rear section of the front mudguard to find the brake hose that loops up over the front wheel to connect both front calipers was bent up UNDER the mudguard. Surely this has to be wrong and dangerous because road bits (like rocks) could hit it? There's a channel on both sides of the mudguard that looks tailor made to route the pipe over not under the mudguard and I'm assuming this is the correct way. The pipe is bent all shapes and I'm very reluctant just to twist it into another shape for fear of a fatigue crack and subsequent disaster. Am I right in thinking that it goes over the mudguard? If so, new pipe will be fitted.
Thanks in advance,
Andy

[TIV]

Hi Andy, itīs under the mudguard on my K75RT. Or rather under the fork brace if I remember it correctly. I had a new one made when I rebuilt my bike few years ago.

[TimTyler]

Same as on my RT.

[Liverpool Brick]

Hi,
Thanks for your replies. When you changed the front pipe on the RT did you route it back under the brace? I can't help feeling that by going under, the pipe will be subject to a lot of road dirt and subsequent risk of failure. I've found this photo which seems to show the pipe going over but I don't want to go away from original spec. Help!
Andy

[TIV]

I used the old pipe as model to make a new one. My old pipe was in great condition apart from that the nuts that screw into the calipers had been abused with the wrong size of spanner and was rusty. If you make a new one, make sure that it goes as far up/into the fork brace as possible and keep it close to the fork legs on each side.

As a matter fact there are tabs with 6mm holes in them on the fork legs, two on each side. The purpose of these are to hold the front and rear part of the fender in place. They are also used to mount two simple fasteners to hold each side of the pipe/loop close to the  legs. These fasteners are made of plastic originally but can easily been made from metal strip or some suitable material.

This link is useful, although I did not find these small fasteners. Drill down to the brake section and the front fork/suspension section and you have pretty good pictures of things. http://realoem.com/bmw/partgrp.do?model=0565&mospid=51742

[Liverpool Brick]

Hi Tiv,

Thanks for info. and great link. Its good to be able to see what things look like. Routing it behind the forks and under/behind the fork brace will be an improvement on the way it is at present but I'm still unhappy about it being under the mudguard and not over, so what I've done is got the repairman to make me a new pipe going behind the forks and over the guard. Unfortunately I don't have the tool to splay the ends so I can't make the pipe myself. I'll post a nice picture when its done. Thanks again.
On a side note, this being Northern Ireland its pouring down as usual so I'll not need my bike for a day or 2. However, next weekend is The Northwest 200 Road Race so lets hope it dries up. Link:  http://www.northwest200.org/

[JamesInCA]

So ... why were you removing the mudguard?

[Liverpool Brick]

Hi,
I took the mudguard off to get easier access and see what's going on. I'm glad I did.
Andy