Flying machine prime pump to continue running

Hello, I have a 200cc 2 stoke using a Walbro WB that will
only cold start when I pump the primer bulb until the engine warms up. After the engine warms up a bit, it runs very well and starts without a hitch. The fuel line is good as well the primer. Carb is all sealed up no vacuum leaks. No blockage of the fuel passages. 
Thanks, Greg.

I'm missing something....
 
Its starts, runs fine once warm, what exactly is the issue?
 
.

Are you saying that you have to keep pumping the primer bulb, even after the engine starts, and after a while it calms down and runs without further priming?