What it's doing.
Thanks for the link, that make things clearer, at least I now know where the water sensor is now. I can start checking out the connections (im-probable due to the suddenness with which the fault appeared), and the sensor, let's see if this old dog can learn new tricks.
The problem started this summer, I was working 7/7 12 to 16 hours a week to get a job done (no time to look into it sooner), suddenly, starting problems not helped by the starter not engaging part of the time. When the engine would turn over, it would try to run like a no choke start, too lean a mixture. A little accelerator (choke at maximum) gave best results, when running, cold, flat difficult to build up revs, once up in the 2000 plus range, better, but needs coaxing to keep running, it feels like a manual choke that does n't work. Once warmed up it runs normally. Three days ago, the weather turned cold, it fires weakly sometimes for a second then stops, the battery gets weak and the nothing. The bike will not push start, before, I could always push start easily (I've had the 85 K100 six years now with only minor problems).
Does that help?