Bleed the brakes, bleed the brakes, bleed the brakes, bleed.......did i say bleed the brakes.....

As already mentioned, these bikes are not easy to bleed. The rear master cylinder has limited capacity. I just flushed my brakes and it took forever with the master cylinder to cycle the old fluid through. Suggest you use a pressure or vacuum bleed system. Your mechanic friend should know what to use. Good luck.