Use this bleed procedure. I have used it many times on my 1150RT and on my 05 K1200s Servo Brake.
You will need a funnel to keep the ABS Servo reservoir full while bleeding so that you don't suck air into the system.
I bought a 2 dollar funnel and used a water tap seal from the hardware store.
Superglue the rubber seal on to the funnel and you are good to go.
The seal is about a 3/4inch or 20mm diameter.
And buy yourself a couple of feet of clear hose.....Makes the job less messy.
Make sure you know which bleed nipple is for what circuit..... I mistakenly was opening the rear nipples and was wondering why there is no fluid coming out when pumping the handlever.
And here are a few tips:
Buy Bendix DOT4 Brake fluid. Its blue in color and you can then see if you have pushed all the old fluid out. Next time use clear brake fluid again.....
Don't turn the ignition on when doing the "Control circuits". No need to have the pumps running. Just gently push the fluid through and keep topping up the reservoirs (Handle bar / rear brake).
When doing the brake circuit, insert the funnel into the ABS unit reservoir and fill it to the top.
(Might be easier with two people)
Turn the ignition on
Then, pull on the lever until the Microswitch turns the Servo pumps on and hold it there. No need to pump on the lever, just let the pumps run.....
The Servo Pumps are then going to slowly.....and I mean really slowly.....draw the fluid out of the funnel and push it through the brake lines to the calipers/bleed nipple.
Do the front left caliper first, don't know why but thats what BMW says in the maintenance manual. Then do the right.
And you are supposed to push the pistons back into the calipers and hold them there.....I never did, and it always worked for me.
Pretty straight forward job.....if you know what you are doing. HAHA