Carburetor cranks but bike wont start

[blue knight]

I had just put in the carburetor kit in my K9 about four months ago and a new wiring harness Gen-2. Rode my bike last night and it started perfectly well. When I turned it off and tried to start it again, it would not turn on even with the petcock on. I'm baffled and dont know why it wont start...

 

[Sven]

With a volt meter set at the 20v scale, what is the voltage read on the battery?
With leads still one the battery, start engine. What drop in voltage did the battery show?