The further you turn the air screw in the richer it makes it. 1/2 will be ok. It will still give you some adjustment for temp changes.Hi I’m new to the thread . And have a few questions thought maybe a few you fellas could chime in and help me out .. I purchased a pwk 28 mm from Vito blaster parts anyways. I have a fully rebuilt motor and boysen Reed stock bore fmf fatty pipe and fmf Silencer .I can get it to run nice with a 112 main and a 32 pilot with air screw half turn out but that seems lean to me .shouldn’t the air screw be at least 1.5 turns out if I do this it won’t idle .. and bogs Help please.. I know the motors sound it’s was just rebuilt .. HELP
Or buy next size up pilot jet.