Can't get my bike started.

[db274302]

Ok.
Again, thank you to all that have replied to my issue. I've been working on the bike today.
1. Got new battery
2. got new spark plug
3. Drained carburetor, then primed to make sure fuel was entering the engine. (every thing worked)
4. Checked ignition system by firing the spark plug to endure it was firing correctly. (every thing worked)

Then I let it sit with the fuel set to prime and eventually got the engine to turn over but it immediately stopped.
I've let it sit for about ten minutes at a time and each time can get it to turn over and start for about 5 seconds then it just stops.

Thanks again.