First of all the G26 carb is too big for a Homelite 25 in a airplane situation

The G23 carb WA167-1 11.11mm would be about the maximum size a Homelite 25 can handle on a airplane

Some of this depends on if you are running a 16 X 10 or a 18 X 8 prop and if the engine as been modified as to compression ratio, combustion chamber shape, or port timing

Another factor and one that you can apply to what you have, is that you need a velocity stack or venturi extension on your carb. You can use the one for the Zenoah or other available ones even sold by Tower Hobbies. This will help stabilize the incoming air going into the carb.

The next thing is the little vent hole on the cover of the regulator on the carb needs to be positioned down stream of the airflow or have a brass tube soldered into the hole and a piece of Tygon ran from the vent hole to a neutral pressure zone inside the fuselage

These are efforts to make the airflow around your carb be consistent