fouling plugs

Use an 8 plug not a 9 (if so)
Open up the airbox lid
go back to a 45 pilot and drop the needle all the way.
Recheck the main with a plug chop, 1.5-2mm soot ring. if your airbox is not stock: If may now be too lean. 152-155 is typical at under 1000 feet.
Set the AS for best off-idle power, not highest idle speed.

or better:
Needle CGK at -2 or -3, 38 or 40 pilot.
same thing on the main, airbox lid and AS.