hmm,it sounds like jetting is off ,maybe clogged ,airfilter clean?
what jets you run in the carb ,which altitude you,re at
maybe floatheight too high ,and maybe petcock filter clogged.
also kips not overrotating ? it obstructs exhaustflow at low rpm
it should take off like a missile with a twist of the wrist,not like yours does,
i had once issues like you ,i downsized the pilotjet one size 60>58
that solved my issue ,did yours smoke too when it was cutting out on you?