bigger jets are bigger-they allow more fuel,and oil to go through the carb---- unless!!!
it is a oil injected motor!!!--- yours isnt
bigger the number = bigger jets
the needle clip-- the higher the position on the needle = a leaner position
the lower = richer position
leaner=less
richer=more
either it would be
richer /leaner---- air,fuel, oil,
to lean out the oil premix you need to use less oil- in the gas /or by the oil injecter-(depends on what model )
you also need a leaner main jet if you change the reeds -(because you will not use the stock reed stops)- and the reeds will open up farther
try good oil!!! -- klotz burns clean and is verry good
i use 36:1/or 40:1
either way your plug needs to burn a tan color,from bottom-mid-top it should be close or the same color
the air screw allows more air in the carb ?1.1/5-- 2.1/5 turns out from the closed position is what alot of them are,i cant say for everyone--im not ***** lol