Start problems with Kawasaski Z650 B1

For many years, the Kawa has refused the start service if it is longer than about five days; then only something goes with start pilot or/and bridge from the car. Previously done: Original ignition coils exchanged for that of a GPZ. Renewed carburetor parts. Switched to DYNA contactless ignition. Powerful gel battery tried out, which resulted in partial success; but I had ruined the battery because I had connected it to a normal charger… Regulators and rectifiers by a compact unit replaced. Recently as good as all cables of the tree renewed, while eliminating some bad masses. Now I stand on the hose… Can someone help me down there again?