So I rebuilt the motor on my ninja 650r put it back together today tried to start her up and all I hear is the starter motor going. Idk what the issue is.

I did lay my bike on its side to put the engine in, also the battery is shot but was jump starting it from my car ( I know I shouldn't do that )

EDIT:: I was rethinking everything. I had the flywheel gear backwards causing it to not turn over now its turns over but doesnt fire up