Mike, both the idle screw and the adj main jet start at about 1 1/2 turns off of the seat is where to start.
The idle screw adjust air so out is lean and in is rich!
The adj main jet is out for rich and in for lean! The adj-jet was designed to "tweak" the mix for fine tuning. The jet size is just a bit bigger than the stock one so the needle will influence the fuel flow, however once you are about 2 1/2 turns out the needle is pretty much done with it's ability to add more fuel. It is a sensitive adjustment.
Did you check to see if the float was at the correct setting?
When you were messing with the rotor did you check the centrifugal advance for smooth operation? Very important.
Dave Neptune
