Hello,
Are you confident to do the carb overhaul yourself.
If so,

before buying a kit, you can clean out the carb, paying particular attention to the main jet at the bottom of the reservoir bowl, (all these bits are made of brass)
I clean mine in an ultrasonic bath, but compressed air will do.
DONT POKE WITH A WIRE
If it was running ok before then dont change any settings.
Reassemble carb onto manifold DRY. (no goop)
Cordialement,
