[Gaz64]

Gary,

A few things:

I would try another carb on that engine, like a QFT 750-850.

A Brown cam is for a 50cc pump, you can't run a brown cam with a 30cc pump.

Sounds like your carb is lean everywhere and you are trying to make up for fuel curve inadequacies with excess pump squirter volume.

Look at some of the "highly tuned" double pumpers that can still run white cams (218) or long throttle duration pink cams (330).

Accelerator pump tuning is the last circuit to adjust, the others must be addressed first, preferably on a dyno.