It all depends whether it's the pilot jet or main.
For the main jet, raise the jet needle clip position until as desired. For the pilot circuit, try turning the fuel metering screw clockwise (inwards) until it smooths out. If it doesn't, buy a smaller pilot.
Any questions or problems, I'll be at work lol, can help later
Jarrah
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2000 TT-R250M-
Spoiler
Ported & polished, 73mm bore, Wizeco piston, US header pipe, FMF Q4, #150 main jet, #52.5 pilot jet, throttle stop screw adjusted, larger snorkel, GYT-R air filter, NGK Iridium spark plug, 14/51 gearing, NOS +
