Your overcarb'ed for a stock port to begin with, but it shouldnt hurt much up top but carb velocity is deff low. How does it run? have you done a plug chop? Leak down and compression test? +6 swinger with holeshots = fail. Use the search function key words, "plug chop", "best dirt tires", "leak down test", and "compression test". And read read read.
Oh and welcome