Motorcycle Questions? Ask a Mechanic.
Hi and welcome to the site, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, have you checked the spark plugs?
Still, let's check/review the basics. Proposed preliminary tests (if have not been done) after the "...bike will start, then imediatly dies...":
The above would determine if the issue is electrical/ignition (least likely) or fuel delivery/starvation (most likely).
Have you checked for consistency of IGN+12V to the fuel pump motor? ...and if it has good ground connections?