Not a fan of ABS, having worked on a 1100RS for 18 months now. Having replaced lots of BMW brake lines, please allow me to suggest a method...
You'll want to download a
Fragola parts catalog from their site. (There are many other makers too, I just use Fragola.) Look at the section on
AN-3 stainless steel covered Teflon PTFE hydraulic hoses and fittings. I suggest their hoses with
black vinyl outer sheath. All BMWs use only 10mm x 1.00 threads.
Plan the shortest route from the master cylinder to the caliper, front and rear. The idea is to replace as many rigid steel lines with a single flexible hose. A single hose bleeds easier and flexes over a longer distance, thereby lasting longer. These hoses are much more pressure tolerant, thereby making a
noticeable improvement in braking efficiency.
On my 1988 RS I was able to run a single hose from the front M/C all the way to the top of the caliper. That cut out 2 steel tubes and 2 flexible hoses. I left the steel tube that connects the 2 calipers in place. In hind sight, I should have run the new hose to the RH caliper, and moved the bleed nipple to the LH caliper. That would have reduced the hose length by 12" and made routing even easier.
My 41" hose was a special order AN-3 with black sheath, pn 312-1-3-41. Straight on one end, 3/8 banjo on the other. On the straight end (used at the handlebar M/C end) I screwed in a stock AN-3x3/8 banjo fitting, pn 650103. You can clearly see the longer and slimmer factory installed banjo worked great on the Brembo caliper end.
I ordered all this from
Race Part Solutions at 561-375-6277.
I believe this gives me the exact hose I want at a price that typically saves me money over the pre-made brake line kits from motorcycle suppliers. And the black sheath makes it look completely stock. I'll gladly answer more questions on this subject.
All the best.
