You do not need to have the rebuild kit.
Take apart, clean and inspect every part.
You will see some obvious dirt.
Put it back together and give it a try.
Please check this.
In your first picture there should be a hose running from the brass nipple #5 to the vac. port of the fuel valve.
This cuts off the flow of fuel when the bike is not running.
Make sure you have all the hoses hooked up correctly.