Slag,
When jetting your carb if you find that you need to turn the pilot jet all the way in to improve response then you likely need to switch to a smaller number of pilot.
If on the other hand you need to turn it more than 2.5 turns out you likely need a larger number pilot.
Pilot Jet & Air Screw Controls the fuel/air mixture between Idle and 1/4 throttle. (keeping in mind all the circuits do overlap)
Turning the air screw clockwise reduces the air flow and richens the circuit.
Turning it counter clockwise increases the airflow and leans the circuit.
Increasing the size of the pilot jet ( size of the hole ) richens the circuit by supplying more gasoline; i.e. removing a 40 pilot jet and installing a 42 richens the circuit.
Every jet is identified by a number and that number relates directly to the size of the opening inside the jet. (pilot that is) Again smaller is leaner, larger is richer.
One or two size's wrong won't destroy the engine, if you can try a #55 and then a #52. You should have to back out your airscrew some with each lower pilot jet.
I relize not all engines are exactly the same so your mileage may vary!
Some thing else to consider is quality of the manufacturer. No-name brand seem to be alot less consistant, look for the "DrunkenStar" stamped on Keihin jets.
Tuck\o/
(edited 
I had it wrong...Again Thanks Don for Keeping an eye out!
