I just returned home from a small ride and I had strange situation one moment. I had really hard braking to a corner and after that all th ilumination of the tacho, speedometer and other things - like boost, voltage and oil pressure just dissapeared with an exception of small spot of light in the middle of the speedo. After stoping and switching ights on and of a few times and moving the brightness regulator everything came back to normal. What was that???