My Honda GX25 came with a WYL carb. Since that carb doesn't have a high end adjustment, it didn't work for me - the engine kept sagging from a lean mixture at full throttle. You need a WYK series if you want a fully adjustable barrel carb. It has a high end adjustment screw on the body of the carb and a low end screw in the top of the throttle arm.

Cheers,
Charlie