Just bought an FZ6 after 30 years non biking, gave it a good wash on Sunday, took it for a spin, and had the same problem! Was panicking thinking I had bought a pile of shite, after an hours run, just got home, it cured itself, so was guessing it may have been something due to the wash.
Then searched on the internet, found this thread on, which assured me everthing was ok, which it is now, must get water in somewhere which shorts a switch.