I am a little suprised at the lack of help on this site!
I am quite new to this site. In April I had some issue with my brakes on my K1200R and posted a thread on here, explaining the issues and asking for any advice. NOTHING! Not a dicky bird from anyone.
I then posted the same question asking for help on a non BMW site I am a member of, RSVR (Yes I also have an Aprilia), and an abudance of information was forthcoming, including the contact details of a really helpful guy called Roy in the North of the UK who helped me out with the issue. The Aprilia guys all help each other out even when it's not an Aprilia!
For anyone who would like to know. The micro switch on the brake lever was the fault. It was sticking. This switch is for the modulator on the ABS and not the brake lights as I assumed. Once cleaned and the switch was free to work correctly again, all worked as it should and the brakes released as they should.
My experience of this site does make me wonder what it's for???