I just started the DL for the first time. I blew through the vent tube to get the gas to the carb. Fliped it 15 times with choke closed and ignition off. Turned ignition on and choke on, fliped it four times and it poped. Turned choke off and four more flips and it was running. I put only 12 oz of fuel in it and heat cycled it twice. When I got almost empty I did a fast full throttle burst to get a rpm reading. With a JFX 27 X 10, factory carb settings, and only 12oz of fuel ever run in it, the DL-100 turned 6250rpm.
This is my first gasser over 50cc.
I had the wife work the throttle as I held the plane and tach.
It was a mother to hold back.
Balancing will be just fine without adding any weight.