i dunno anything specific.. But a float bowl always has something in it that floats.. a ball? i guess so.
Whatever it is.. It floats upwards and pushes on a little valve-thing near the float's pivot hinge. That valve then shuts off fuel. Fuel can no longer enter the bowl until some fuel is used by the engine.
That drops fuel level and the float drops and the valve opens again.. and a little more fuel is allowed into the bowl.
The float-ball-thing might be ok. The little float-valve itself might be leaking. In fact, it's far more likely that the valve is leaking.
Look closely at the valve's tip (probably a black plastic tip) Is it's sharp tip scratched or worn over or does it have a groove around it? If so you probbly need a new one. The valve tip must be perfect.
If the float-valve's tip looks ok, the valve-seat (up there where the tip fits into) might be damaged or dirty.