Bike won't start

[mgherman]

Tried to start the 2003 GZ yesterday. Last time I started is was 2 weeks ago. Won't start, the battery was dead. I charged it, then I tap the honk, the honk was working. Still it won't start. After few failed attemps it started, then shut it off, tried to start again, but won't start.
I checked the battery connections-they are clean and free of corrosion and are on tightly.
Next step is buying a new battery, but still the starting issue is not solved.
Could be a faulty contact. I am thinking of buying a new starter switch.

Any help is appreciated.
Thank you.